Fish Feeding Calculator
Calculate the right amount of fish food for your aquarium.
Avoid overfeeding with proper portion sizes by fish type.
Feeding Guide
Proper fish feeding prevents overfeeding — the most common cause of aquarium problems.
The 2-minute rule: Feed only what your fish can consume in 2–3 minutes. Remove any uneaten food after that time.
General feeding amount:
- Each fish should eat roughly 2–3% of its body weight per day
- Small fish (~1 inch / 2.5 cm): ~1–2 pellets per fish
- Medium fish (~3 inches / 7.5 cm): ~3–5 pellets per fish
- Large fish (~6+ inches / 15+ cm): ~8–12 pellets per fish
Feeding frequency by type:
- Tropical community fish: 1–2 times daily
- Goldfish: 1–2 times daily (small amounts)
- Bettas: Once daily (skip 1 day per week)
- Cichlids: 2–3 times daily
- Bottom feeders: Once daily (at night)
- Fry (baby fish): 3–4 times daily (tiny amounts)
Overfeeding signs: Cloudy water, algae bloom, ammonia spike, leftover food on substrate.