Stocking density, fish biomass and daily feed amount.
Fish count comes from tank volume and density, total weight is biomass, and a percent of that is fed daily. Fish both produce plant nutrients and consume dissolved oxygen, so density and feeding drive the whole balance.
Aquaponics Stocking
Fish = tank x density; biomass = fish x weight; feed = biomass x rate%
Fish = tank x density; biomass = fish x weight; feed = biomass x rate% Fish count comes from tank volume and density, total weight is biomass, and a percent of that is fed daily.
Fish both produce plant nutrients and consume dissolved oxygen, so density and feeding drive the whole balance.
This calculator takes 4 inputs: Tank volume, Stocking density, Average fish, Feed rate. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.