Freshwater Angelfish (Pterophyllum scalare) Care Guide

Introduction

Freshwater angelfish (Pterophyllum scalare) are one of the most iconic and beloved cichlids in the aquarium hobby. Native to the slow-moving rivers and floodplains of the Amazon Basin in South America, their elegant triangular bodies and flowing fins make them a stunning centerpiece for any community tank. With proper care, angelfish can live 10–12 years and grow up to 6 inches in body length (12+ inches tall including fins).

Aquarium Setup

Tank Size

A 55-gallon or larger tall tank is ideal for a small group. Angelfish are tall fish — prioritize tank height (at least 18–20 inches) over length.

Water Parameters

• Temperature: 76–86°F (24–29°C)
• pH: 6.0–8.0 (soft, slightly acidic water is preferred)
• Hardness (GH): 3–8 dGH
• Ammonia/Nitrite: 0 ppm
• Nitrate: <20 ppm with regular water changes

Filtration & Flow

Use a quality canister or hang-on-back filter rated for at least 5–10x the tank volume per hour. Angelfish prefer gentle to moderate flow — avoid strong currents that stress their fins. A sponge filter or spray bar diffuser works well to reduce turbulence.

Substrate & Décor

Fine sand or smooth gravel substrate mimics their natural habitat. Tall plants like Amazon swords, Vallisneria, and Java fern provide cover and spawning surfaces. Driftwood and leaf litter help soften the water and replicate the tannin-rich blackwater environment. Leave open swimming space in the center of the tank.

Lighting

Moderate lighting suits angelfish well. Floating plants like frogbit or water lettuce can help diffuse intense light and reduce stress.

Diet & Feeding

Angelfish are omnivores with a preference for meaty foods. Feed 2–3 times daily, offering only what they can consume in 2–3 minutes.

• Staple: High-quality cichlid pellets or flakes
• Protein supplements: Frozen or live bloodworms, brine shrimp, daphnia, and blackworms
• Vegetables: Blanched spinach or zucchini (occasional)

Avoid overfeeding — it degrades water quality quickly in a warm tank.

Tankmates

Angelfish are semi-aggressive cichlids, especially when breeding. Choose tankmates carefully:

Compatible Tankmates

• Corydoras – peaceful bottom dwellers that won't compete for space
• Rummy-nose tetras, cardinal tetras, black skirt tetras – schooling fish large enough not to be eaten (avoid very small nano tetras)
• Bolivian rams – another South American cichlid with similar water requirements
• Bristlenose plecos – excellent algae control, peaceful with angels
• Keyhole cichlids – docile cichlids that coexist well
• Dwarf gouramis – generally compatible in larger tanks

Shop for Suitable Angelfish Tankmates and Other Aquatic Life

Incompatible Tankmates

• Fin nippers – tiger barbs, serpae tetras, and similar species will shred angelfish fins
• Very small fish – neon tetras, ember tetras, and small rasboras may be eaten
• Aggressive cichlids – oscars, Jack Dempseys, and convicts will bully or injure angels
• Goldfish – incompatible temperature and water chemistry requirements

Behavior & Social Structure

Angelfish are best kept in groups of 4–6 when young, allowing them to pair off naturally. They establish a pecking order and can be territorial, especially around spawning sites. A dominant pair may harass other fish — monitor closely and rearrange décor if aggression becomes an issue.

Breeding

Angelfish are relatively easy to breed in a home aquarium once a bonded pair forms.

• Spawning surface: They prefer to lay eggs on broad leaves (Amazon sword), flat rocks, or PVC pipe
• Egg care: Parents fan and guard eggs; hatching occurs in 48–60 hours at 80°F
• Fry feeding: Start with infusoria or commercial fry food, then transition to baby brine shrimp
• Tip: First-time parents often eat their eggs — remove eggs to a separate hatching tank if this occurs repeatedly

Common Health Issues

• Ich (white spot disease): Treat with raised temperature (86°F) and aquarium salt or medication
• Hole-in-the-head disease (HITH): Linked to poor water quality and nutritional deficiencies — improve diet and perform frequent water changes
• Fin rot: Caused by bacterial infection from poor water conditions; treat with antibacterial medication
• Bloat/dropsy: Often fatal; caused by internal bacterial infection — quarantine immediately

Maintenance Schedule

• Daily: Check temperature, observe fish behavior, remove uneaten food
• Weekly: 25–30% water change, gravel vacuum, check filter flow
• Monthly: Clean filter media in tank water (never tap water), inspect equipment

Quick Stats

• Scientific name: Pterophyllum scalare
• Family: Cichlidae
• Origin: Amazon Basin, South America
• Size: Up to 6" body length, 12"+ tall
• Lifespan: 10–12 years
• Difficulty: Beginner–Intermediate
• Temperament: Semi-aggressive
• Min. tank size: 55+ Gallons Recommended