My recommendation is to stock fewer fish as well. In 1/3 acre, without aeration, assume your carrying capacity to be 500 lbs of fish per acre of water. This equates to about 165 lbs of fish in 1/3 acres of water. Now assuming you'll want half of your biomass in hybrid bluegill and half in catfish, you can safely and easily:
stock 50 catfish and grow them to 2 lbs avg size for 100 lbs biomass
stock 170 hybrid bluegill and grow them to 1/2 lb avg size for 85 lbs biomass
I know this adds up to 185 lbs, but you'll lose some fish along the way to natural forces
You can make adjustments to these projections based on expected harvest size and harvest expectations
Won't comment on prices
Hope this helps
