Tilapia in a barrel

Can a person successfully raise 40 tilapia in a 55 gallon barrel like the catfish in a barrel? With only an aerator and draining and replacing 15 gallons per day of water from the bottom of the barrel I will try. Does anyone have any input on this? I'm new to the aquaculture experience. Here is my website if you want to follow the progress I will begin to post the experiment on 3/28/08 when I get my fish. Please give any info you think I may need!

I am interested in the same project. Please post your website or email me so i can see your progress.