Angelfish Care Guide (2026)

Angelfish Care Guide (2026)

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Angelfish at a Glance

Scientific Name Pterophyllum scalare
Common Names Angelfish, Freshwater Angelfish
Adult Size 6 inches body length; up to 8 inches tall
Lifespan 8–12 years
Tank Size (minimum) 30 gallons (single); 55+ gallons (group)
Temperature 76–84°F (24–29°C)
pH 6.0–7.5
Hardness 3–8 dGH
Diet Omnivore — pellets, flakes, frozen/live foods
Temperament Semi-aggressive; territorial with own species
Beginner Friendly Intermediate — manageable with proper setup

Overview

Angelfish are one of the most recognizable freshwater aquarium fish in the hobby. Their distinctive triangular shape, flowing fins, and graceful movement make them a centerpiece species in almost any community tank. Native to the slow-moving rivers and floodplains of the Amazon Basin, angelfish are cichlids — which means they are intelligent, personable, and capable of aggression, particularly during breeding.

When kept in an appropriately sized tank with compatible tank mates and stable water conditions, angelfish are hardy and long-lived. They are not the easiest beginner fish, but they are far more manageable than their reputation suggests. This guide covers everything you need to keep angelfish successfully.

Tank Size

The minimum recommended tank size for a single angelfish is 30 gallons, and taller tanks are preferable to wide, shallow ones. Unlike most community fish, angelfish grow vertically as much as they do horizontally. Their long dorsal and anal fins mean aquarium height is just as important as total volume, making taller aquariums a better choice than shallow breeder-style tanks.

A 55-gallon tank is the practical minimum for a small group of 4–6 angelfish, and larger is always better when keeping multiple individuals. Undersized tanks increase aggression, stress, and water quality problems. Angelfish kept in tanks that are too small grow more slowly, show more territorial behavior, and have shorter lifespans. See our Best Fish Tanks guide for recommendations across different sizes and budgets.

Water Parameters

Angelfish originate from the warm, soft, slightly acidic waters of the Amazon Basin. Their water parameter requirements reflect this origin:

  • Temperature: 76–84°F (24–29°C). Angelfish are tropical fish and require a heater in most home aquariums. Temperatures below 72°F cause immune suppression and increased disease susceptibility.
  • pH: 6.0–7.5. Angelfish prefer slightly acidic to neutral water. Captive-bred angelfish are more adaptable than wild-caught specimens, but stability matters more than hitting an exact number.
  • Ammonia/Nitrite: 0 ppm at all times. Any detectable ammonia or nitrite indicates a water quality problem requiring immediate attention.
  • Nitrate: Under 20 ppm. Maintained through regular water changes of 25–30% weekly.
  • Hardness: 3–8 dGH. Soft to moderately hard water is preferred. Very hard tap water may need conditioning for long-term breeding success.

Test your water regularly, especially in new tanks. See our Best Water Test Kits guide for recommendations.

Filtration

Angelfish require clean, well-oxygenated water but are sensitive to strong flow — their tall, disc-shaped bodies make swimming against a powerful current tiring and stressful. Aim for a turnover rate of 4–6 times the aquarium volume per hour, while using a spray bar or adjustable outlet to diffuse strong current.

Canister filters are an excellent choice for angelfish tanks — they provide strong biological filtration with minimal surface disturbance. Hang-on-back filters with adjustable flow also work well for tanks up to 55 gallons. See our Best Aquarium Filters guide for specific recommendations.

Heating

A reliable heater is essential for angelfish tanks. For tanks up to 55 gallons, a 150–200 watt adjustable heater is appropriate. Larger tanks may require two heaters for even heat distribution. Always use a separate thermometer to verify actual water temperature rather than relying on the heater's built-in indicator.

See our Best Aquarium Heaters and Best Aquarium Thermometers guides for recommendations.

Lighting

Angelfish do not have strict lighting requirements. A consistent photoperiod of 8–10 hours per day supports their natural day/night rhythm and benefits any live plants in the tank. Avoid leaving lights on 24 hours — angelfish need a dark period to rest. See our Best Aquarium Lights guide for options.

Substrate and Decor

Fine sand or smooth gravel works well for angelfish tanks. In their natural habitat, angelfish are found among dense vegetation, submerged roots, and driftwood — replicating this in the aquarium reduces stress and encourages natural behavior. Tall plants like Amazon swords, vallisneria, and java fern are ideal. Driftwood and broad-leaved plants provide spawning surfaces for breeding pairs.

See our Best Aquarium Substrate and Best Aquarium Decorations guides for recommendations.

Feeding

Angelfish are omnivores with a preference for meaty foods. A high-quality cichlid pellet or flake should form the base of the diet, supplemented with frozen bloodworms, brine shrimp, and daphnia 2–3 times per week. Feed small amounts 2–3 times daily rather than one large feeding, and remove uneaten food promptly to maintain water quality. Angelfish will also accept live foods and can be conditioned for breeding with a varied, protein-rich diet.

Tank Mates

Angelfish are semi-aggressive cichlids that can be kept in a community tank with careful species selection. Good tank mates include corydoras catfish, larger tetras (rummy nose, black skirt, cardinal), rams, gouramis, and peaceful bottom dwellers. Avoid small tetras like neon tetras with adult angelfish — they may be eaten. Also avoid fin-nipping species and other aggressive cichlids.

  • Corydoras — excellent bottom-dwelling companions
  • Neon Tetras — compatible with juvenile angelfish only; at risk with adults

See our Angelfish Tank Mates Guide for a full compatibility breakdown.

Common Health Problems

  • Ich: White spots resembling salt grains. Raise temperature to 86°F gradually and treat with ich medication. Highly contagious — treat the entire tank.
  • Hole in the Head (HITH): Pitting or erosion around the head and lateral line. Associated with poor water quality, activated carbon use, and nutritional deficiencies. Improve water quality and diet.
  • Fin Rot: Ragged, receding fin edges caused by bacterial infection. Improve water quality and treat with antibacterial medication if progressing.
  • Velvet: Gold or rust-colored dust on the body. Dim lights, raise temperature, treat with copper-based medication.
  • Internal Parasites: Wasting despite eating, stringy white feces. Treat with antiparasitic medication. More common in wild-caught specimens.

Angelfish FAQs

Are angelfish good for beginners?

Angelfish are intermediate-level fish. They are manageable for beginners who research their needs first, but they require a larger tank and more stable water conditions than typical starter fish. See: Are Angelfish Good for Beginners?

How long do angelfish live?

8–12 years with proper care in a well-maintained aquarium. See: Angelfish Lifespan

How many angelfish can I keep together?

Angelfish can be kept in groups, but pairs will form and become territorial during breeding. A 55+ gallon tank with 4–6 individuals gives enough space to distribute aggression. See: Angelfish Tank Size Guide

Can angelfish live with neon tetras?

Juvenile angelfish can coexist with neon tetras, but adult angelfish will often eat them. See: Angelfish with Tetras

Can angelfish live with corydoras?

Yes — corydoras are one of the best tank mates for angelfish. See: Angelfish with Corydoras

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