Angelfish look like the most delicate fish in the shop, all tall fins and slow grace, but they are cichlids with real personality. They recognise the person who feeds them, pair up, defend territory and, if you plan the tank around their size and temperament, live for up to ten years.

Table of Contents

• Angelfish at a Glance
• Tank Size and Shape
• Water Parameters
• Plants and Decor
• Popular Angelfish Varieties
• How Many Angelfish to Keep
• Tankmates: What Works
• Feeding Angelfish
• Pairs and Breeding Behaviour
• Choosing and Bringing Home New Angelfish
• Health Signs to Watch
• Common Angelfish Mistakes
• FAQ

Angelfish Care Guide: Tank Setup, Tankmates and Feeding

Angelfish at a Glance

The angelfish you buy are usually juveniles of a few centimeters. That is exactly why so many end up in tanks that are too small a year later. Plan the tank for the adult.

Tank Size and Shape

Height matters as much as volume. Angelfish grow tall, so choose a tank at least about 45 cm high, and allow roughly 100 liters for a pair, with more space for a group of young fish that will later pair off. A longer tank also gives a breeding pair room to claim territory without bullying everyone else.

• Gentle flow: those long fins are not built for strong current.
• A fully cycled tank: add angels to a mature tank, not a new one. Our nitrogen cycle guide explains how.
• A lid: angels rarely jump, but a cover reduces evaporation and keeps temperature stable.

Water Parameters

Most captive-bred angels adapt well to a stable pH within that range, so do not chase a number. Change about 25–30% of the water every week, and treat new water with a conditioner. See Water Parameters 101 for testing and our water change guide for the routine.

Plants and Decor

Angelfish come from slow, plant-filled waters and feel safest among tall stems and vertical wood. Leave open water in the middle for swimming.

• Tall background plants and vertical driftwood recreate their natural habitat and give them cover.
• Broad leaves are where a pair will often lay its eggs.
• Tannins from Indian almond leaves give the water a soft amber tint and a more natural feel.

Popular Angelfish Varieties

All the colour forms below are the same species, Pterophyllum scalare, so they share the same care and can live together.

Koi Angelfish – Orange, Black and White

A marbled mix of orange, black and white that varies from fish to fish. The Yellow Head Koi adds a bright golden head.

Blue Diamond – Blue Shine with Age

Young fish look plain, but the blue colouring develops as they mature.

Bulgarian and Leopard – Classic Patterns

Bulgarian angels show soft, elegant markings, while Leopard angels are covered in dark spots.

Super Red Devil Longfin – Flowing Fins

Longfin forms have extra-long, trailing fins. They are beautiful but even more vulnerable to fin-nippers.

How Many Angelfish to Keep

Angelfish are social when young and more territorial as adults. The most reliable approach is to buy a group of five or six juveniles in a large enough tank and let them pair off naturally. Once a pair forms, it may claim part of the tank; in a smaller tank, you may need to rehome the extra fish.

• A single angel is fine in a community tank and avoids pairing aggression.
• A known pair works well in a 100-liter tank.
• Three or four adults in a small tank is where most fighting happens.

Tankmates: What Works

Good angelfish tankmates are peaceful, not too small, and not interested in long fins.

• Bottom dwellers: bristlenose plecos and corydoras keep to the bottom and stay out of the angels’ way.
• Medium tetras in groups: Rummy Nose tetras work well, especially if they are added before the angels grow large.
• Other calm, mid-sized community fish with similar water needs.
• Avoid: fin-nippers such as tiger barbs, and very small fish like tiny tetras or shrimp, which adult angels may eat.

Feeding Angelfish

Angelfish eat both prepared and meaty foods. Feed once or twice a day, only what they finish in about two minutes, and offer variety through the week.

• Staple: a quality pellet or stick sized for their mouths.
• Variety: foods that mimic live prey, plus frozen bloodworm or brine shrimp if you use them.
• Bottom fish: make sure some food reaches the plecos and corydoras too.

Pairs and Breeding Behaviour

A pair usually announces itself: two fish stay together, clean a broad leaf, a piece of slate or the glass, and chase other fish away from that spot. The female lays rows of eggs and both parents fan and guard them.

• Expect territory: breeding pairs become much more defensive, which can stress tankmates in a small tank.
• Early spawns often fail: young pairs commonly eat their first eggs and improve with practice.
• Raising fry is easiest in a separate tank with very gentle filtration.

Choosing and Bringing Home New Angelfish

Healthy young angels are alert, swim upright with fins held open, and come forward when food appears. Avoid fish that hang at the surface, hide in a corner with clamped fins, or show white spots or torn fins.

1. Prepare the tank first: it should be fully cycled, heated and stable before the fish arrive.
2. Float the bag for about 15–20 minutes so the temperature matches.
3. Add tank water to the bag gradually over 20–30 minutes so the fish adjust to your water.
4. Net the fish into the tank and throw away the bag water.
5. Keep the lights low for the rest of the day and feed lightly the next day.

Health Signs to Watch

Warm water holds less oxygen, so in hot weather keep the tank below about 29°C; our summer cooling guide explains how.

Common Angelfish Mistakes

• A tank that is too short or too small for the adult fish.
• Housing them with fin-nippers, which shred their long fins.
• Adding tiny fish that become food as the angels grow.
• Keeping three or four adults together in a small tank, which leads to fighting once pairs form.
• Skipping water changes, which shows first as frayed fins and dull colour.

If you see clamped fins, white spots or frayed edges, check your water first and then read our fish diseases guide.

Frequently Asked Questions

Conclusion

Give angelfish height, gentle flow, clean water and peaceful tankmates that are not bite-sized, and they become the calm centrepiece of a planted tank for years.

Recommended Products

• Yellow Head Koi Angelfish
• Blue Diamond Angelfish
• Longfin Albino Bristlenose Pleco
• Royal King Angelfish Food
• Jeneca LT-600 Hang-On Filter
• Java Fern

Related Articles

• Best Community Fish for a Freshwater Aquarium
• Fish Compatibility Guide: Which Fish Can Live Together
• Best Low-Tech Aquarium Plants for Beginners
• Common Freshwater Fish Diseases and How to Treat Them
• How to Cycle a New Aquarium: The Nitrogen Cycle Explained