Plus, fish tank-raised fish are vital to aquaponics. We recommend Oreochromis Mossambicus Tilapia. It’s a mild white fish that we harvest in 7 to 9 months when they weigh 1.25 pounds and produce 2 four-ounce fillets. Fresh Tilapia fillets. FISH:Tilapiais a low-fat, white-fleshed fish th...