In Missouri, tilapia are only OK (Legally) in closed systems. I wish we could try them here. The following is an email I received. It's so much legal jargon, but they can't ban fish in aquaria, even if it's a big aquarium. I have two 700 gallon tanks.

Nice to visit with you. Go to the link below for all Wildlife Code rules and
click on Chapter 9. Scroll down to 9.110 "General Prohibitions" and start
reading in section (3). As long as your system satisfies section (3),
subsection (E), paragraph 4 (i.e. a closed system), you can keep tilapia and
many other species of fish. There are a few species that cannot be possessed,
under any circumstances and these "prohibited species" are listed in Chapter 4
(snakehead fish and walking catfish). Here's the link to all the Wildlife Code
chapters:

http://www.sos.mo.gov/adrules/csr/current/3csr/3csr.asp

Feel free to call if anything you read is confusing.

Mike Kruse
Fisheries Programs Supervisor
(573) 522-4115 ext. 3159

*****
I get my all male fish (forced that way by hormones)from the following source. See the old email that follows.

Hi Doug, I saw your submission to the aquaponics one list. We ship single box orders to small growers and academic institutions. A single box contains as many as 2,000 fingerlings, and costs $250. Shipping (UPS Red Label) is $85 and boxes cost $10. Let us know if we can help. In the meanwhile, you may want to visit our website.

--
Sincerely,
Damon Seawright
AmeriCulture, Inc.
HC 65 Box 260C
Animas, NM 88020
505-548-2328 phone
505-548-2631 fax
[email protected]
http://www.americulture.com

ps-this email is two years old, and I think I got a break as a teacher.


Still learnin'...