Stocking Calculator
Plan your stock with checks for bioload, filtration and compatibility
Filters
How is it calculated?
Waste, for each fish
(size ÷ 5 cm)2.25Adult length0.5–1.5BioloadwarmthAbove 25°C
Room in the tank
volume ÷ 4 LWater1 · 0.7 · 0.35Fresh · Brackish · Salt
Stocked
wasteAll fishroomThe tank%Stocked
Filtration
flow × 65%Filters, with mediawaste × 16 L/hFlow needed%Filtration
This is an estimate, not a rule. Plenty more goes into a healthy tank, but this gives you a good idea of where you stand.
Add fish to see how they fit