The management and care of the fish in your aquaponics system is only minorly affected by the species you choose. While feed types and amounts, preferred pH levels and dissolved oxygen requirements may vary from one type of fish to the next, many of the basic parts of fish care are the same among all commercially viable varieties. Plants are much less sensitive to routine changes or management mistakes than fish, and they also tend to be less expensive to replace after a major loss. Learning the ins and outs of fish management in the aquaponics system is essential to a profitable and successful business.