I was looking at using goldfish at first or possibly blue gills. I read that goldfish can survive a wide range of temps, but i'd like to keep the temp around 70-75 deg. with the use of using some kind of heat source in a tiny greenhouse and in the fish tank. I live south of Dayton and unfortunately can't find any blue gill for sale, maybe i'll just go catch some small ones in a pond later on!

I want to build some type of enclosure for the AP system that measure 6'x6'x6'. Not too big to heat, but big enough to move around in. Of course this is plan can be, and probably will be, changed as I move forward with this project. Any ideas on final stocking densities for 55 gal. barrels and possible pumps to use?
Thanks again for the help.
apnewb