Finally, the amount of fish you can safely keep in your system depends on many factors, such as:
- feeding rates
- water flows
- oxygen levels
- the number of plants
- pumping rates
- fish species
We recommend using quality aquaculture seed for fish feed. Actually, they can be enhanced with other foods such as worms, maggots, black soldier fly larvae and many other different types of food. However, it is always good to have a granulated stock feed base as an essential component of the fish diet.
People often ask to keep a system completely closed, to produce all the necessary flows within the system and from the waste and scrap of the system. This works to a limited extent, but external input must be made into the system if nutrients are removed from the system in the form of food to be eaten. (Backyard Aquaponics, 2019)