Build your stocking list and get a tank size that accounts for adult size, shoaling needs, temperament and bioload — not the old “inch per gallon” rule that under-sizes every large fish.
Search by common or scientific name. Quantities start at each species’ healthy minimum group.
Filtration and upkeep change how much water a given stocking actually needs.
Enter its volume and the result becomes a verdict on that tank rather than a generic target.