Yep you can do it, if they'll eat it. A carnivorous fish like perch might not grow as fast though. Tilapia would do fine on it. Some people that really want organic feed go this route, since organic fish feed is hard to find.
With a submersible pump you can add a air intake line to the water pump and bubbles will come out of you water line.
Use bubble air hose, make a hole for it, or attach it to the water intake. When the pump sucks in water, it will also be pulling air into the line.
Make a hydrogen generator and put the oxygen port in the intake. Burn of or use hydrogen, dont store it.
Check your pockets for water buffalo. You might need to use this tiny ad until you locate a water buffalo:
A rocket mass heater heats your home with one tenth the wood of a conventional wood stove