How Often and How Much Should You Feed Your Fish?

Mayur Dev|October 22, 2026

Overfeeding harms more aquarium fish than starvation. Learn how often to feed different fish, how much is enough, how to spot overfeeding, and simple routines that keep your water clean and your fish healthy.

More aquarium fish are harmed by overfeeding than by starvation. Fish beg and always look hungry, but a small stomach and a big appetite are a bad combination in a closed tank. This guide shows how often and how much to feed, so your fish stay healthy and your water stays clean.

The Golden Rule: Small and Regular

Feed adult fish once or twice a day. Give only what they can finish in about 1 to 2 minutes, then remove any leftovers. Juvenile fish need smaller, more frequent meals, around 2 to 3 times a day.

Fish type	How often	How much
Community fish (tetras, guppies, rasboras)	1 to 2 times a day	What they finish in 1 to 2 minutes
Goldfish	1 to 2 times a day	A small amount of sinking pellets
Bettas	1 to 2 times a day	A few pellets per feed
Bottom feeders (corydoras, plecos)	Once a day, in the evening	Sinking wafers, shared among the group
Juvenile fish and fry	2 to 3 times a day	Tiny portions
Shrimp	Once a day or less	Very small, remove leftovers within a few hours

Signs You Are Overfeeding

Food left on the substrate after a few minutes
Cloudy water or a greasy film on the surface
Rising ammonia, nitrite or nitrate
Sudden algae growth
Bloated fish and long stringy waste

Overfeeding is a common cause of cloudy water, covered in our cloudy water guide.

Signs You Are Underfeeding

Thin bodies, sunken bellies and nipping at other fish can signal hunger. This is rare in home tanks, so rule out overfeeding and illness first.

A Weekly Fasting Day

Many keepers skip one feed day a week for healthy adult fish. It gives the gut a rest and keeps the tank cleaner. Do not fast juveniles or sick fish.

Going Away?

Most healthy adult fish manage a few days without food. Do not dump extra food in before you leave, because it will rot. For longer trips, use a trusted person with pre-portioned packs, or an automatic feeder.