Aquaponics Digest - Thu 02/11/99
Message 1: Redclaw vs Tilapia
from mdsenger@webtv.net (Michael Senger)
Message 2: Re: Small shipments of Tilapia
from S & S Aqua Farm
Message 3: earthworm & pathogens?
from "Jorg D. Ostrowski"
Message 4: RE: Pool turning into Reality
from "Ronald W. Brooks"
Message 5: Re: Small shipments of Tilapia
from "Glennert Riedel"
Message 6: Re: Redclaw Sources in Oz
from PHRL33A@prodigy.com (MS JEAN R SHAFFER)
Message 7: RE: Pool turning into Reality
from "Fred Chambers, FMChambers@CSUPomona.edu"
Message 8: RE: Small shipments of Tilapia
from "Ronald W. Brooks"
Message 9: Solar Cells
from james.rakocy@uvi.edu (James Rakocy, Ph.D.)
Message 10: Re: Pool turning into Reality
from KLOTTTRUE
Message 11: Re: Pool turning into Reality
from KLOTTTRUE
Message 12: Suppliers
from HoneyAcres
Message 13: Aquaponic Suppliers
from HoneyAcres
Message 14: Re: Small shipments of Tilapia
from KLOTTTRUE
Message 15: Re: Aquaponic Suppliers
from "Christian J. Hedemark II"
Message 16: RE: Suppliers
from Alan Lloyd
Message 17: Re: Pool turning into Reality
from KLOTTTRUE
Message 18: Clothing, was Re: Pool turning into Reality
from S & S Aqua Farm
Message 19: Re: Clothing, was Re: Pool turning into Reality
from KLOTTTRUE
Message 20: Fish Markets
from HoneyAcres
Message 21: Re: Collabrative HUGE Reference
from "Glennert Riedel"
Message 22: Re: Pool turning into Reality
from doelle
Message 23: Re: earthworm & pathogens?
from doelle
Message 24: Re: Pool turning into Reality
from Dave Miller
Message 25: Re: Pool turning into Reality
from Michael Strates
Message 26: Re: Pool turning into Reality
from Dave Miller
Message 27: Re: Pool turning into Reality
from Dave Miller
Message 28: Re: Pool turning into Reality
from Michael Strates
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| Message 1 |
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Subject: Redclaw vs Tilapia
From: mdsenger@webtv.net (Michael Senger)
Date: Thu, 11 Feb 1999 00:26:09 -0700 (MST)
Having had a year of aquaculture experience with both tilapia and
redclaw I feel the redclaw is not worth the trouble. They really have
very little meat on them, grow slowly, die for no reason, the males
constantly kill and mutlilate each other, they like to climb out of
their tanks. They will also capture and eat small tilapia. When I put
redclaw and tilapia together, the tilapia get very nervous .
The tilapia are so much easier and so much more rewarding..
Some lessons I have learned.
(1) Feed the fish the right sized food. If your pellets are too large,
the fish have a hard time eating it and their growth will suffer.
(2) Keep the fish warm. Even in a greenhouse in Arizona, water
heating in winter is the main economic cost factor in raising tilapia.
Cold fish get sick, and sick fish die. Solar can be effectively used,
but large amounts of water require a lot of heat.
(3) Think small. It is better to have 75 pounds of fish in 150 gallons
of water kept at the right temperature than to have 75 pounds of fish in
500 gallons that is too cold. If you just want fish for you and your
family , you may be able to get by with a couple of small, well
insulated, well managed tanks.
(4) In arid climates, when using recirculating aquaponics, the
evaporative cooling effect is significant, and seriously lowers fish
tank water temperature. This is of benefit in summer, but not in
winter.
(5) Pump lots of air in each tank. Fish and plants can live a long time
without main pump recirculation of water especially at night and in
winter. Sometimes it is better just to pump air rather than continue
recirculation, if water temperature can be better maintained. A big
air pump only uses about 40W.
(6) In general, the S&S system has worked well for me.
(7) Add earthworms to the gravel beds.
Sprinkle fresh earthworm castings over the bed surface periodically
(micro biological bacterial innoculant).
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| Message 2 |
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Subject: Re: Small shipments of Tilapia
From: S & S Aqua Farm
Date: Thu, 11 Feb 1999 08:09:23 -0600
At 08:24 PM 2/10/99 EST, Ken wrote:
>how many tilapia can you grow, in say 1000 gallons of water?
Ken - we suggest stocking at no higher than 1/2# per gallon of water, with
maximum set at 3/4# per gallon. The number of fish produced would depend on
your proposed market size, but for initial calculations 500# to 700# should
be reasonable.
Paula
S&S Aqua Farm, 8386 County Road 8820, West Plains, MO 65775 417-256-5124
Web page http://www.townsqr.com/snsaqua/
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Subject: earthworm & pathogens?
From: "Jorg D. Ostrowski"
Date: Thu, 11 Feb 1999 07:16:59 -0700 (MST)
You said:"(7) Add earthworms to the gravel beds.
Sprinkle fresh earthworm castings over the bed surface periodically
(micro biological bacterial innoculant). "
____________________________________________________________________
Michael/Horst: Is the introduction of the above into a hydroponic
system a concern from a pathogen/virus point of view, if the
the water ends up in a marsh used for growing plants for food
and subsequently in fish tank (in our case not for food)? Jorg Ostrowski
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| Message 4 |
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Subject: RE: Pool turning into Reality
From: "Ronald W. Brooks"
Date: Thu, 11 Feb 1999 11:07:21 -0500
it should work just fine. as long as you make sure that it is non treated
as some of the newer plastics are coated to reduce condensation and reduce
algae and mildew.
I have used 6 mil to make bogs inside and out and get a couple of years life
out of them
Ron
-> -----Original Message-----
-> From: aquaponics
-> [mailto:aquaponics]On Behalf Of KLOTTTRUE
-> Sent: Wednesday, February 10, 1999 8:44 PM
-> To: aquaponics@townsqr.com
-> Subject: Re: Pool turning into Reality
->
->
-> I know it would be better to use 20 or 30 mil,but I'm one of those do it
-> yourselfers,who tries to keep cost to a minimum until I see if
-> it is going to
-> work for me.Would it be possible to use the 6 mil poly
-> greenhouse plastic on a
-> trial basis,even if it is just for a year or two? Does anyone know if its
-> toxic.Thanks Ken
->
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Subject: Re: Small shipments of Tilapia
From: "Glennert Riedel"
Date: Thu, 11 Feb 1999 09:25:58 PST
Thanks for the information Ronald, I'll check it out. I'm not looking
for mixed sex Tilapia but they might be helpfull
Glennert
>I must of deleted the post on who was looking for small quantity's of
>mixed sex Tilapia . I have found a source that is very reasonable ( .25
>@ ) shipping is $50 no matter amount ( shipped overnight)
>
>Contact
>Living Waters Tilapia Farm
>(601)795-8094
>they are happy to ship small orders
>
>I also have a contact in Florida for Wild caught Tilapia . these are
part
>of an exotic removal program if you want this name drop me a line
>
>Ron
>The One Who Walks Two Paths
>
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
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| Message 6 |
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Subject: Re: Redclaw Sources in Oz
From: PHRL33A@prodigy.com (MS JEAN R SHAFFER)
Date: Thu, 11 Feb 1999 12:41:45, -0500
Michael
Your answers were very encouraging on yabbies. In the Pacific NW our
solar gain is not enough to run a panal, for weeks to months on end.
But running a hose into the tank is a complete possibility during the
winter since the tank will be fed from roof top runoff via roof
gutters into the tank!! I went to the web page put out by the W
Australia government fisheries. Marron (the native greyfish there)
sounds even more ideal for unheated aquaculture in dank rainy cold
old Washington, USA.
Jean
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Subject: RE: Pool turning into Reality
From: "Fred Chambers, FMChambers@CSUPomona.edu"
Date: Thu, 11 Feb 1999 09:57:27 -0800
> ... he suggested to get a several thousand
>gallon plastic rainwater cistern, cutting the top off that and using it as
>a deep swimming pool and also as a small aquaculture pool.
>
>The one we saw is about 6ft deep, and has a diameter of about 6.5 feet. I
>want to install it inside of my greenhouse. Hopefully we'll be able to
>purchase an old cheap one ($300-500) from up country and the aquaponic
>pool should turn into a reality in about 30 days!!
>
STOP -- Don't pay that much. Assuming you are talking US Dolalrs, the
price range you are using is far too high. The Center for Regenerative
Studies, where I did a lot of aquaculture, bought a couple dozen "Sun-Lite
"tanks from
Solar Components in New Hampshire. A couple of our prof's who had gone to
New Alchemy, swore by them. They cost about $200 a piece, with dramatic
reductions if you buy in volume. Look them up at
http://www.solar-components.com
The tanks are lightweight, and very translucent for light frequencies
necessary for photosynthesis. The tanks green up nicely in a day or two,
ready for tilapia or other planktivores.
I would not want to use a water tank for a swimming/soaking tub because
the fiberglass may irritate your skin. Tanks meant for fish may have the
fiber-substrate in a more inert state.
>So, here come all of the questions. If I fluke a working pool, then I'll
>
>My main concern is any pathogens which might get in the water. So far, my
>results with chlorine dioxide has been pretty bad.. 7/10 fish died after
>my dose per gallon exceeded one teaspoon. This wasn't enough to keep the
>algae and pathogens out, by the looks of things.
>
If you feel that you have to sterilaize the incoming water, do it in
batches, before you add it to your culture water. With a little thought,
you could probably even automate this phase.
Algae is good! It is working *FOR* you. It converts nitrogenous wastes
back into
food. Filter feeding animals like tilapia, silver carp, and bivalves
harvest the plankton. If you don't put filter feeders in, then put carp,
like common carp or goldfish. As the phytoplankton and zooplankton die,
they settle out of the water column. Carps and crayfish will eat this
detritus.
Keep your tank in the sun. In the winters, a cover made from clear ag
plastic keeps the tank warm enough for tropicals outdoors in the snow.
Fred
FMChambers@csupomona.edu Agricultural Sciences
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and post at sites urging alternatives to golf:
http://www.csupomona.edu/~jmikeda/la401/cap/ (Clean Air Park Proposal)
http://www.regen.org/bwecc.html (BWA's Energy Center Proposal)
http://www.intranet.csupomona.edu/~muse/ (Multi-Use Development Strategy)
http://www.rokcircle.com/bbs/ (The Wilderness Forum)
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| Message 8 |
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Subject: RE: Small shipments of Tilapia
From: "Ronald W. Brooks"
Date: Thu, 11 Feb 1999 14:04:14 -0500
they also sell sex reversed all male ( Pennyfish )
Ron
-> -----Original Message-----
-> From: aquaponics
-> [mailto:aquaponics]On Behalf Of Glennert Riedel
-> Sent: Thursday, February 11, 1999 12:26 PM
-> To: aquaponics@townsqr.com
-> Subject: Re: Small shipments of Tilapia
->
->
-> Thanks for the information Ronald, I'll check it out. I'm not looking
-> for mixed sex Tilapia but they might be helpfull
->
-> Glennert
->
-> >I must of deleted the post on who was looking for small quantity's of
-> >mixed sex Tilapia . I have found a source that is very reasonable ( .25
-> >@ ) shipping is $50 no matter amount ( shipped overnight)
-> >
-> >Contact
-> >Living Waters Tilapia Farm
-> >(601)795-8094
-> >they are happy to ship small orders
-> >
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| Message 9 |
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Subject: Solar Cells
From: james.rakocy@uvi.edu (James Rakocy, Ph.D.)
Date: Thu, 11 Feb 1999 16:15:01 -0400 (AST)
Fred, The New Alchemy group hyped those solar cells in the early 80s and
produced reams of data (much of this work was funded by the National Science
Foundation). Unfortunately, solar cells, consisting of a little more than
500 gallons (2 m3) of water, could only produce about 10 lbs. of fish per
crop. I think that even a hobbyist would want more fish than this. It is
based on pond aquaculture except light could penetrate from the sides and
produce more algae. As a result, it increased pond production levels from
0.5 kg/m3 to about 2 kg/m3 with aeration, the limitation being that the
waste had to be treated (broken down) within the tank. In our recent
greenwater trial we obtained production of 17 kg/m3 by removing solid waste
twice daily and shifting from an algal-based system to a bacterial-based
system, although algae was still present in abundance and was utilized for
food by the fish. These are good bacteria that break down organic matter and
transform ammonia to nitrate. We once hooked up one of these "Sun-Lite"
tanks to hydroponic beds (creating an aquaponic system) and produced 365
lbs./crop at a final density of 81.6 kg/m3. The question is this: Do you
want to produce 2 kg/m3, 17 kg/m3 or 81 kg/m3? With solar cells the
researchers applied extensive production principles to a 2 m3 tank, when
these principles were really meant for huge water volumes, say 25 acre ponds
(100,000 m3), where low-input, low-output production might be profitable
when multiplied by a large factor. As a result, no one that I know of ever
used solar cells as a fish growout system after the New Alchemy Institute
closed. The "Sun-Lite" tanks are fragile and you cannot stand in them. Jim R.
>STOP -- Don't pay that much. Assuming you are talking US Dolalrs, the
>price range you are using is far too high. The Center for Regenerative
>Studies, where I did a lot of aquaculture, bought a couple dozen "Sun-Lite
>"tanks from
>Solar Components in New Hampshire. A couple of our prof's who had gone to
>New Alchemy, swore by them. They cost about $200 a piece, with dramatic
>reductions if you buy in volume. Look them up at
>http://www.solar-components.com
>
>The tanks are lightweight, and very translucent for light frequencies
>necessary for photosynthesis. The tanks green up nicely in a day or two,
>ready for tilapia or other planktivores.
>Algae is good! It is working *FOR* you. It converts nitrogenous wastes
>back into
>food. Filter feeding animals like tilapia, silver carp, and bivalves
>harvest the plankton. If you don't put filter feeders in, then put carp,
>like common carp or goldfish. As the phytoplankton and zooplankton die,
>they settle out of the water column. Carps and crayfish will eat this
>detritus.
>
>Keep your tank in the sun. In the winters, a cover made from clear ag
>plastic keeps the tank warm enough for tropicals outdoors in the snow.
>
>Fred
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| Message 10 |
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Subject: Re: Pool turning into Reality
From: KLOTTTRUE
Date: Thu, 11 Feb 1999 18:39:57 EST
When you are working in an aquaponic enviroment,do you need to wear any type
of protective clothing?
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| Message 11 |
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Subject: Re: Pool turning into Reality
From: KLOTTTRUE
Date: Thu, 11 Feb 1999 18:45:40 EST
Thanks for the reply,I checked with the salesman where I bought it today,he
said it was O.K.,but I like to ask someone with experience.He also sells 45
mil rubber pond liners,any thoughts on that? Thanks Ken
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Subject: Suppliers
From: HoneyAcres
Date: Thu, 11 Feb 1999 18:42:33 EST
Does anybody know a supplier of aquaponic systems? (websites?)
Thanks,
Steven
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Subject: Aquaponic Suppliers
From: HoneyAcres
Date: Thu, 11 Feb 1999 18:59:16 EST
Does anybody know suppliers of COMMERCIAL AQUAPONIC SYSTEMS?
Thanks,
Steven
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Subject: Re: Small shipments of Tilapia
From: KLOTTTRUE
Date: Thu, 11 Feb 1999 18:55:32 EST
Hi Paula and Tom,I found a local feed store today,that sells black round poly
tanks,300 gallon for $195.00,What do think?I believe I'm going to go ahead and
try your system,if I send you a money order and include enough for postage,can
you send it next day mail? Thanks Ken
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Subject: Re: Aquaponic Suppliers
From: "Christian J. Hedemark II"
Date: Thu, 11 Feb 1999 19:26:19 -0500
HoneyAcres wrote:
> Does anybody know suppliers of COMMERCIAL AQUAPONIC SYSTEMS?
Steven, your first message less than 15 minutes before this one came
through fine BTW. Check out http://www.aquatic-eco.com
--
Christian J. Hedemark II
http://www.yonderway.com
"Where is Bill Gates taking you today?"
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Subject: RE: Suppliers
From: Alan Lloyd
Date: Fri, 12 Feb 1999 11:34:43 +1100
Try kirsty@intergate.bc.ca and ask her for details.
I also used the Msn search engine and found a lot of references. Typed in
Aquaponics and got a surprisinging wide response.
Hope it is of help.
I've only just got into this mail list. (registered yesterday!!). So hope
someone else add to your info search.
Regards,
Alan
> -----Original Message-----
> From: HoneyAcres [SMTP:HoneyAcres]
> Sent: Friday, February 12, 1999 10:43 AM
> To: aquaponics@townsqr.com
> Subject: Suppliers
>
> Does anybody know a supplier of aquaponic systems? (websites?)
> Thanks,
> Steven
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| Message 17 |
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Subject: Re: Pool turning into Reality
From: KLOTTTRUE
Date: Thu, 11 Feb 1999 19:08:16 EST
Hi Lars, I went to the Dekalb Farmers market today, to check out the fish,
pretty neat, bought some Tilapia to try, they're good eating fish. Thanks for
the tip.
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Subject: Clothing, was Re: Pool turning into Reality
From: S & S Aqua Farm
Date: Thu, 11 Feb 1999 18:27:55 -0600
At 06:39 PM 2/11/99 EST, Ken wrote:
>When you are working in an aquaponic enviroment,do you need to wear any type
>of protective clothing?
What type of protection do you envision needing? Other than clothing suited
to the temperatures and shoes that don't mind the occasional puddle, I'd say
nothing special -- based on our experiences. With no chemical applications
there should be no need for the protective suits they wear for insecticide
spraying, etc.
Or did you have something else in mind?
Paula
S&S Aqua Farm, 8386 County Road 8820, West Plains, MO 65775 417-256-5124
Web page http://www.townsqr.com/snsaqua/
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| Message 19 |
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Subject: Re: Clothing, was Re: Pool turning into Reality
From: KLOTTTRUE
Date: Thu, 11 Feb 1999 20:41:37 EST
Don't evision any, just asking.
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Subject: Fish Markets
From: HoneyAcres
Date: Thu, 11 Feb 1999 20:46:54 EST
Does anyone know of any markets in the Delaware/Maryland Area to sell
aquaponic fish? Is their a website that has the cost and return for
aquaponics?
Thanks
Steven
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Subject: Re: Collabrative HUGE Reference
From: "Glennert Riedel"
Date: Thu, 11 Feb 1999 19:45:15 PST
I'm just starting. As soon as I have some experience I would like to
help
Glennert
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
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| Message 22 |
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Subject: Re: Pool turning into Reality
From: doelle
Date: Fri, 12 Feb 1999 15:57:34 +1100
At 03:01 AM 12/02/99 +1100, you wrote:
>
>Legionella spores float in the air, and could probably be in the
>greenhouse air anyhow. Assuming that spores get into the water, will the
>bacteria grow and prosper in the aquaponics environment. I realise that
>most of these pathogens are anerobic, so I'd assume heavy and frequent
>aeration is a good idea?
It certainly is a good idea and will minimise anaerobic pathogens.
>
>I generally supplement the aquaponics water with small amounts of liquid
>worm castings (just what runs off the wormfarm). I know that it is very
>rich in bacteria. Would it be okay if I chlorinated/uv sterlized (both)
>the casting "tea", and then run the tea through activated carbon, leaving
>a sterile tea to mix with the aquaponics feed?
>
I tink you will find that chlorination will in general do the trick. As you
know, we use chlorination very successfully in swimming pools.
>Does peroxide kill some that chlorine doesn't? I was thinking of trying
>ozonation of the water. I have the absolute simplest way to produce
>ozone.. I brought a $23 jacobs ladder from the local electronics
>retailer.. I'm going to seal this in a glass tank and run air through one
>end, leave for a few minutes and then hopefully ozone will emerge from the
>other end.
>
>In the test which I tried yesterday, the ozone seemed to kill EVERYTHING
>in the sample of humanure/water which I treated... very promising.
>
Ozone is certainly very effective, whereas one has to be careful with UV,
since UV can result in 'changed or mutated ' pathogens. For your purpose,
however, uv certainly will help. In comparing both methods I think that
ozone is more effective. However, I have not done a comparative experiments.
I am a bit suspicious about using UV, the reason of which is simply that we
used to use UV for producing mutants.
Best regards
Horst
Horst W.Doelle, D.Sc., D.Sc. [h.c.]
Chairman, IOBB
Director, MIRCEN-Biotechnology
FAX: +617-38783230
Email: doelle@ozemail.com.au
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| Message 23 |
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Subject: Re: earthworm & pathogens?
From: doelle
Date: Fri, 12 Feb 1999 16:10:11 +1100
At 07:16 AM 11/02/99 -0700, you wrote:
>
>You said:"(7) Add earthworms to the gravel beds.
> Sprinkle fresh earthworm castings over the bed surface periodically
>(micro biological bacterial innoculant). "
>____________________________________________________________________
>Michael/Horst: Is the introduction of the above into a hydroponic
>system a concern from a pathogen/virus point of view, if the
>the water ends up in a marsh used for growing plants for food
>and subsequently in fish tank (in our case not for food)? Jorg Ostrowski
>
The gravel will absorb most pathogens, but I certainly would like to see a
good aeration in the pool to make sure that pathogens do not grow happily in
eventually anaerobic conditions. Also one has to watch that the gravel is
not eventually coated with pathogens.
In the case of earthworms, however, I have not heard of any serious
problems, since they live in the soil and not necessarily in manure.
Always keep in mind that pathogens come from human or animals .
Cheers
Horst
Horst W.Doelle, D.Sc., D.Sc. [h.c.]
Chairman, IOBB
Director, MIRCEN-Biotechnology
FAX: +617-38783230
Email: doelle@ozemail.com.au
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| Message 24 |
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Subject: Re: Pool turning into Reality
From: Dave Miller
Date: Fri, 12 Feb 1999 00:06:48 -0500
Horst,
If I followed the thread correctly, this water will be used for
aquaponics ie. fish and algae, etc.
Also, why encourage chlorination which means more dioxin in the
environment?
Aeration is certainly the best as nature does so with waterfalls and
such...Also the cost from a short AND long term affect would probably
suggest a windmill which turns paddles in the water or brings buckets up
in assembly like fashion and dumps them onto a screen to further aerate
the water.
Sounds like a plan to swim with.
--
Dave
_______________________________________
«¤»¥«¤»§«¤»¥«¤»§«¤»¥«¤»§«¤»§«¤»¥«¤»§«¤»
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
A "green" home remodeler
A father of 2 cockatiels
An organic farmer
A veggie drummer/keyboardist
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| Message 25 |
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Subject: Re: Pool turning into Reality
From: Michael Strates
Date: Sat, 13 Feb 1999 03:18:35 +1100 (EST)
On Fri, 12 Feb 1999, Dave Miller wrote:
I know this isn't addressed to me, but I'll answer anyway:
DM> If I followed the thread correctly, this water will be used for
DM> aquaponics ie. fish and algae, etc.
Yes, but the water must also be used for swimming in, which is where all
of the complexity comes from. The system must be completely free of
pathogens, or close to it.
DM> Also, why encourage chlorination which means more dioxin in the
DM> environment?
Because its a surefire way to remove pathogens inexpensively. I'm actually
seriously considering ozonation.
DM> Aeration is certainly the best as nature does so with waterfalls and
DM> such...Also the cost from a short AND long term affect would probably
DM> suggest a windmill which turns paddles in the water or brings buckets up
DM> in assembly like fashion and dumps them onto a screen to further aerate
DM> the water.
If the water is constantly aerated, theres no way anerobic pathogens can
grow, right? If that is the case, I have enough air coming from a
compressor to line the whole bottom of the pool with airstones (underneath
the rocks). This would stir up the water though, and it wouldn't be
pleasant to swim in. How about several water falls near the sides and one
big underwater bubbler in the middle, which can be shut off when we're
swimming in it?
--
e-mail: mstrates@croftj.net www: http://www.croftj.net/~mstrates
See keyservers for PGP info. Linux! The OS of my Choice!
"Once you have flown, you will walk the earth with your eyes turned
skyward, for there you have been, and there you long to return."
- Leonardo da Vinci, and below an extract from John Fogerty's song:
Hey, Tonight - Gonna be tonight- Don't you know I'm flyin'- Tonight
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| Message 26 |
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Subject: Re: Pool turning into Reality
From: Dave Miller
Date: Fri, 12 Feb 1999 00:22:06 -0500
I sense a jacuzzi coming on.
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Dave
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A "green" home remodeler
A father of 2 cockatiels
An organic farmer
A veggie drummer/keyboardist
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| Message 27 |
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Subject: Re: Pool turning into Reality
From: Dave Miller
Date: Fri, 12 Feb 1999 00:26:35 -0500
Actually, some lakes have had put fountains in the middle. I assume
this is more than just for romantic attention. Just how much aeration
is needed. Like a fan, how many water turnovers/day or whatever are
needed to keep the water free of pathogens.
Anyone know the rate?
--
Dave
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¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
A "green" home remodeler
A father of 2 cockatiels
An organic farmer
A veggie drummer/keyboardist
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| Message 28 |
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Subject: Re: Pool turning into Reality
From: Michael Strates
Date: Sat, 13 Feb 1999 03:33:37 +1100 (EST)
On Fri, 12 Feb 1999, Dave Miller wrote:
DM> Actually, some lakes have had put fountains in the middle. I assume
DM> this is more than just for romantic attention. Just how much aeration
DM> is needed. Like a fan, how many water turnovers/day or whatever are
DM> needed to keep the water free of pathogens.
Can't answer your question.. Hopefulle Horst will be able to answer this
one, however - there is a dam near our house which is built on top of a
rubbish tip and a fountain runs 24 hours a day to keep the methane in the
lake bed.. the whole area has "NO SMOKING" and "KEEP OUT" signs
everywhere, but what do I care? :-)
S&S Aqua Farm, 8386 County Road 8820, West Plains, MO 65775 417-256-5124
Web page http://www.townsqr.com/snsaqua/
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