Aquaponics Digest - Tue 09/14/99
Message 1: Re: I want to join your discussion group
from Adriana Gutierrez & Dennis LaGatta
Message 2: (no subject)
from Dtec99
Message 3: Re: I want to join your discussion group
from
Message 4: Re:
from
Message 5: RE: Trout Aquaponics?
from "Charlie Shultz"
Message 6: Root Crops
from
Message 7: RE: Root Crops
from Jones Nick A PSNS
Message 8: Re: tilapia
from Kevin Hopkins
Message 9: Re: Root Crops
from "Jerry Fuelling"
Message 10: Re: Root Crops
from MUDDTOO
Message 11: Re: Root Crops
from Marc & Marcy
Message 12: Re: Root Crops
from Butch Ragland
Message 13: Re: Root Crops
from Jennifer Maynard
Message 14: Re: Root Crops
from Jennifer Maynard
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Subject: Re: I want to join your discussion group
From: Adriana Gutierrez & Dennis LaGatta
Date: Tue, 14 Sep 1999 06:45:09 -0400
Hi Jewel,
I went to a workshop in West Virginia where we set up a recirculating
system for trout for a votech school. They already had a tilapia
set-up. The reason people use tilapia is because they are much more
forgiving of poor water conditions, temperature, etc. The USDA in
Kearneysville did a lot of aquaponics research with trout effluent and
it worked just fine. As to regs, call the State Dept of Wildlife or its
equivalent.
Adriana
> Does anyone know if there are Tilapia regs in Colorado?
> Has anyone ever heard of doing aquaponics with native species, like trout?
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Subject: Re: I want to join your discussion group
From:
Date: Tue, 14 Sep 1999 8:23:04 + 5 EST
We didn't commit an entire system to aquaponics with our trout a few years
back, but we did get
fairly decent growth on lettuce in our trout system. Sorry I can't help
more. Water temperatures of
course limited our growth - tilapia seem to work best!
Mike
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Subject: Re:
From:
Date: Tue, 14 Sep 1999 8:24:47 + 5 EST
Wendy,
we are looking at filling our system with cats - most likely 200-300 fish -
thanks though!
Mike
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Subject: RE: Trout Aquaponics?
From: "Charlie Shultz"
Date: Tue, 14 Sep 1999 06:57:15 PDT
Yesterday, Jewel wrote:
>Has anyone ever heard of doing aquaponics with native species, like >trout?
Hi Jewel,
the latest issue of "Practical Hydroponics and Greenhouses" describes an
aquaponic system (Australia) combining the culture of trout with wassabe
(spicey green sushi condiment).
Check it out.
Charlie
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Subject: Root Crops
From:
Date: Tue, 14 Sep 1999 11:27:03 + 5 EST
Hi!
1. Anyone have thoughts on the success/failure of toot crops in an
aquaponics system?
2. Also, my students are interested in starting an "aeroponics" unit (roots
in mid-air, misted every
so often. Anyone have a supplier for a timer that will turn on a pump just
about every five minutes
so that I can get an appropriate misting cycle. We have some ideas for the
structures, but need a
bit more help!
Thanks,
Mike
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Subject: RE: Root Crops
From: Jones Nick A PSNS
Date: Tue, 14 Sep 1999 08:57:10 -0700
Mike,
There was a discussion group, centered around an underwater
city as near as I can figure, back about 4-5 years ago. They were going to
use hydroponics and they kept having problems with root type crops because
the size/shape depended heavily on the rooting medium. Aeroponic carrots for
example would grow about a foot or so long and the diameter of a pencil. The
resistance of the soil evidently determined the shape, not genetics.
"Custom shaped carrots/potatoes/beets using shaped foam in
an aeroponics set-up"???
A relatively inexpensive timer, for cycles of a few minutes,
could be "hacked" from an automotive windshield wiper timer. The most
commonly used cycle time configuration is an R/C (resistance/capacitance)
electrical circuit. Those using integrated circuits can be tinkered with as
well. The relays used in those units generally are capable of switching
about 7-10 amps DC at 12V. I manufacture small quantities of these for a
local auto accessory company and have thought about converting one to try
out for this type of set-up. Your post may be the thing to get me off the
"thinking" part into the "doing" part. "This is not an advertisement, I do
this for fun/education"
nick
-----Original Message-----
From: MCOMET@south-lewis.moric.org
[mailto:MCOMET@south-lewis.moric.org]
Sent: Tuesday, September 14, 1999 4:27 AM
To: aquaponics@townsqr.com
Subject: Root Crops
Hi!
1. Anyone have thoughts on the success/failure of toot
crops in an aquaponics system?
2. Also, my students are interested in starting an
"aeroponics" unit (roots in mid-air, misted every
so often. Anyone have a supplier for a timer that will turn
on a pump just about every five minutes
so that I can get an appropriate misting cycle. We have
some ideas for the structures, but need a
bit more help!
Thanks,
Mike
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Subject: Re: tilapia
From: Kevin Hopkins
Date: Tue, 14 Sep 1999 11:48:24 -1000
Dear Wendy,
Thanks.
Regards,
Kevin
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Subject: Re: Root Crops
From: "Jerry Fuelling"
Date: Tue, 14 Sep 1999 19:38:38 -0500
Mike:
Hummert International (as do several other greenhouse suppliers) offers a
startup mist propagation system. Usually these systems have a standard 24
hour clock like the ones typically used to control security lights. These
are 120 v. and available at at any hardware store. The second timer may be
either 24v or 120v. depending on which type of valve you use. I recommend
using the 120v. because of greater flexibility. You could hook any of the
digital timers on the market to a 120v valve. Misting cycles are usually
set to be on for a couple of seconds interrupted by and off time of several
minutes during daylight. It all varies according to your growing
environment and light.
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Subject: Re: Root Crops
From: MUDDTOO
Date: Tue, 14 Sep 1999 21:49:00 EDT
In a message dated 9/14/99 8:57:57 AM Pacific Daylight Time,
jonesn@psns.navy.mil writes:
> They were going to
> use hydroponics and they kept having problems with root type crops because
> the size/shape depended heavily on the rooting medium. Aeroponic carrots
for
> example would grow about a foot or so long and the diameter of a pencil.
The
> resistance of the soil evidently determined the shape, not genetics.
Hello Mike,
I concur with the above. I grew potatoes in sand bags full of perlite and
they all came out with weird shapes, nothing looking like a potato, and with
a sand paper skin texture. The tasted real good and grew easily.
Have you thought of growing some root plants in solution? This may give the
roots some support and allow them to grow almost normally. I used 5 gallon
buckets this year w/ tomatoes, and peppers. The only extra is a small air
pump and air stones. No timers, pumps, or valves needed. We also grew about
70 head of lettuce in nutrient solution. I used styrofoam shipping boxes
about 2 foot square to hold five plants each. These boxes were used to ship
grapes and I got them from the Luckys supermarket dumpster. For a teacher
they'd probally let you use the front door :-)
I don't believe you need to actually spray or mist the roots in aeroponics.
A closed plant holder with a small amount of liquid and an air stone in the
bottom will keep the enclosed air moist at very low cost.
Write if you need to see pictures of some cheap and reliable methods to grow
plants.
Joel
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Subject: Re: Root Crops
From: Marc & Marcy
Date: Tue, 14 Sep 1999 20:00:04 -0600
..snip..
120v valve.
..snip..
A 24V valve is electrically much much safer when it comes to
electrocution if a proper isolation transformer is used.
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| Message 12 |
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Subject: Re: Root Crops
From: Butch Ragland
Date: Tue, 14 Sep 1999 21:00:39 -0400
Please send pictures of ur system
A growing media constructed of sphagnum and clay top soil grows very well.
Wet the sphagnum very well then mix the fine dry clay so as to coat the
sphagnum fibres.
Now you must not drench the media and wash off the the clay. It will grow
more like the earth than perlite and such.
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| Message 13 |
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Subject: Re: Root Crops
From: Jennifer Maynard
Date: Tue, 14 Sep 1999 22:16:42 -0300
Joel, could you send me the information that you are offering below.It sounds
interesting
jennifer
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