just got some silver perch the bloke said thats what he feeds his?
anyone got a design for an aerator im thinking wind powered ? for 25000gal tank

I've seen dry cat food used for feeding Trout in Idaho. Dry dog food has been used for Tilapia. I've used dry cat food as bait for crabs.

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.