How much should fish eat

Fish are overfed far more often than underfed: leftovers rot and poison the water. Enter how many fish, their length and the water temperature.

Your pet

Number of fish

Average fish length, cm

From the nose to the base of the tail, without the tail fin.

Tank volume, L

Water temperature, °C

Result

Weight of all fish, approx.2 g
Dry food for all0–0.05 gAs much as they eat in 2–3 minutes. The rest is surplus and fouls the water.
Meals per day1–2
Tank — at least25 L

Fish die from overfeeding more often than from hunger: leftovers rot and poison the water with ammonia.
One day a week without food does fish good.
Alternate flakes, pellets and frozen food.

This is a guide for a healthy animal. For a sick, pregnant or old one, the diet is set by an exotic-animal vet.