Aqua Basics

Angelfish Care: A Complete Guide

By Nadia Brooks · October 10, 2026
Angelfish Care: A Complete Guide

Angelfish Care: A Complete Guide

Contents

Angelfish (Pterophyllum scalare) are popular freshwater fish known for their elegant fins and unique personalities. They thrive in warm, slightly acidic to neutral water with minimal stress. Proper care involves maintaining water quality, providing a spacious tank, and offering a varied diet. Angelfish are generally peaceful but can become territorial during breeding.

Quick Care Summary

How to Set Up an Angelfish Tank?

Angelfish require a tall aquarium to accommodate their vertical fin extensions. A minimum of 20 gallons is suitable for juveniles, but adults need at least 55 gallons, especially if kept in pairs or groups. Use fine to medium-grade gravel or sand and add driftwood, broadleaf plants, and vertical decorations to mimic their natural habitat. Floating plants can provide shaded areas, which angelfish prefer. Ensure gentle water flow, as strong currents stress them.

Filtration

A sponge filter or undergravel filter works well for angelfish. Avoid excessive water movement, as angelfish are not strong swimmers. Regular water changes (10%-25% weekly) are essential to manage dissolved organics and bacterial loads.

What Are the Ideal Water Parameters for Angelfish?

Angelfish thrive in warm, slightly acidic to neutral water:

Higher temperatures promote faster growth and breeding but may shorten their lifespan. Consistency in water parameters is key to their health.

What Do Angelfish Eat?

Angelfish are omnivores and will eat a variety of foods, including:

Feed 2–3 times daily, offering only what they can consume in 2–3 minutes. Avoid overfeeding, as it can degrade water quality.

What Are Suitable Tank Mates for Angelfish?

Angelfish can coexist with other peaceful, similarly sized fish. Avoid fin nippers or aggressive species. Suitable tank mates include:

Do not keep them with aggressive cichlids or small fish like neon tetras, which they may eat.

Tank Mate TypeExamplesCompatibility
TetrasCardinal, Rummy NoseHigh
CatfishCorydoras, PlecosHigh
Other CichlidsDiscus (larger tanks)Moderate
Small FishNeon Tetras, GuppiesLow

What Are Common Angelfish Problems?

  1. Fin Rot: Caused by poor water quality. Regular water changes and proper filtration can prevent it.
  2. Hexamita (Hole-in-the-Head Disease): Treat with metronidazole and stress reduction.
  3. Aggression: Occurs during breeding. Separate pairs or provide ample space.
  4. Parasites: Capillaria and gill flukes are common. Treat with heat (95°F for 7–10 days) and medication.

FAQ

How Big Do Angelfish Get?

Adult angelfish can grow up to 6 inches in length and 8 inches in height (including fins). Pterophyllum altum species can reach up to 10–13 inches in height.

How Long Do Angelfish Live?

With proper care, angelfish typically live 8–10 years. Cooler temperatures may extend their lifespan but slow growth and breeding.

Are Angelfish Aggressive?

Angelfish are generally peaceful but can become territorial during breeding. Avoid overcrowding to minimize aggression.

Can Angelfish Be Kept Alone?

Yes, angelfish can be kept alone as centerpiece fish. However, they are social and may thrive better in pairs or small groups.

Do Angelfish Need a Heater?

Yes, angelfish require a heater to maintain a stable temperature between 78°F–84°F.

Can Angelfish Live with Guppies?

Guppies are not ideal tank mates for angelfish, as they may be eaten due to their small size.

What Fish Cannot Live with Angelfish?

Avoid fin-nipping species like tiger barbs, aggressive cichlids, and small fish that fit in their mouths (e.g., neon tetras).

Sources