TankStockingHow many Freshwater Angelfish in a 55 gallon tank?
A 55-gallon (208 L) tank comfortably holds about 1 Freshwater Angelfish as a single-species display, leaving room for tankmates and a margin for error.
Freshwater Angelfish key facts
| Adult size | 15 cm |
|---|---|
| Minimum tank | 29 US gal |
| Minimum group | 1 |
| Temperament | Semi-aggressive |
| Temperature range | 24–30°C |
| pH range | 6–7.5 |
| Bioload | Medium |
| Swim level | Midwater |
| Beginner-friendly | Yes |
Sources & confidence (1 species)
This backs the Freshwater Angelfish size, tank and group figures used here. Each figure is read from the TankStocking species database (v2026.06); below is the care reference behind it and how confident we are in that data. Confidence reflects the source quality, not whether any pairing is safe. Full source list and the welfare model are on the methodology page.
- Freshwater Angelfish Pterophyllum scalare — Seriously Fish (seriouslyfish.com/species/pterophyllum-scalare) high confidence
TankStocking sizes this from a per-species footprint — the territory and waste a single Freshwater Angelfish needs in a comfortable display tank — rather than the unreliable "inch per gallon" rule. On that basis a 55-gallon tank comfortably suits about 1 Freshwater Angelfish. This is a comfortable display range, not a hard ceiling: stocking lighter keeps water quality stable and leaves headroom for tankmates and growth.
TankStocking's bio-load gauge alone would not flag a tank this size as over-stocked until roughly 14 Freshwater Angelfish — but that is a model maximum, not the recommended number. It leaves no headroom for water-quality swings, tankmates, or growth, so treat 1 as the comfortable target.
The two things to plan around are predation and fin-nipping: an adult angelfish will eat neon and ember tetras, and nippy tankmates will tear its long fins. The engine clears medium, peaceful fish too large to be swallowed — bigger tetras, rainbowfish, corydoras and similar. They need height, so think tall tanks, not nano ones.
Want a community rather than a single-species tank? The Freshwater Angelfish tank mates guide lists the species the engine clears with Freshwater Angelfish.
1× Freshwater Angelfish
✓ Good starter plan1× Freshwater Angelfish
About 1 Freshwater Angelfish is a comfortable display level for 55 gallons — fewer is always safer, and leaves headroom for tankmates.
Load this build in the planner ↑Your tank
no size setPick a common size, or enter your own dimensions.
Add fish & invertebrates
Search 126 freshwater species by name or group.
Verdict
Common questions
How many Freshwater Angelfish can I keep in a 55-gallon tank?
A 55-gallon (208 L) tank comfortably holds about 1 Freshwater Angelfish as a single-species display, leaving room for tankmates and a margin for error.
What size tank do Freshwater Angelfish need?
Freshwater Angelfish need at least 29 US gallons. Bigger is better — more water means more stable parameters and more room to stock tankmates.
More on stocking Freshwater Angelfish
Related guides on TankStocking — each scored by the same welfare engine as the planner.
Freshwater Angelfish tankmates & community
Freshwater Angelfish in other tank sizes
Stocking numbers are planning estimates — filtration, planting, and maintenance all shift the real ceiling. Cycle the tank and stock gradually. How this estimate works →