In aquaponic systems, you can grow any freshwater fish that appeals to you. You will want to consider natural environment that the fish species comes from to ensure that your aquaponic system can provide a similar environment. Trout, for example, like water temperatures below 65 degrees. Can your environment consistently provide this? If you are mixing fish species together in the same tank, be sure that they have similar living requirements. Do they all prefer the same water temperature, eat the same food, and have the same oxygen requirements?
Don’t mix carnivorous fish with herbivores, or you will find that you are just providing an expensive meal for your carnivores! We have found that tilapia, other cichlids such as oscars, pacu, goldfish, and koi all co-exist well together in an aquaponics system.