Aquaponics Digest - Tue 01/20/98 





Message   1: Re: Interesting Website
             from John Shannonhouse 

Message   2: 
             from james.rakocy@uvi.edu (James Rakocy, Ph.D.)


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| Message 1                                                           |
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Subject: Re: Interesting Website
From:    John Shannonhouse 
Date:    Tue, 20 Jan 1998 12:42:37 -0600

Hello,
        People have had trouble entering the web site
http://www.aquanet.com/aquastore/
        I just tried it.  There was no password required and nothing
blocked me.
John Shannonhouse




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| Message 2                                                           |
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Subject: 
From:    james.rakocy@uvi.edu (James Rakocy, Ph.D.)
Date:    Tue, 20 Jan 1998 16:45:11 -0400 (AST)

Hi, I'm new to the group. Just some short responses to Paula and Ted.
Spirula may be a good food additive but it is also very expensive. Spirulina
farms dry and encapsulate it and sell spirulina as health food. The price
per kg is many times greater than fish meal and so it would not be
economiclly feasible for food fish feed, already a major production cost,
but it may be economically feasible as aquaria feed for expensive and
colorful ornamentals.

In aquaponics all available surface area should be devoted to high value
plant production (lettuce, herbs, etc.). This is critical to turn a profit,
especially in environmently controlled greenhouses. Although algae is a good
food for herbivorous/omnivorous fish, it is more than 95% water.  It is
economically better to feed a concentrated, dry (<10% water), complete
(contains all necessary vitamins and minerals) diet and let the hydroponic
plants contribute to wastewater treatment, as they remove nutrients even
faster than algal turf, the rate of uptake depending on the type of
vegetable, herb, etc.

Jim R. 



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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