Quick Care Summary
| Parameter | Value |
|---|---|
| Scientific Name | Pterophyllum scalare |
| Adult Size | 6–8 inches (15–20 cm) height, 8–10 inches span |
| Lifespan | 8–12 years |
| Minimum Tank Size | 30 gallons (tall preferred) |
| Temperature | 78–82°F (26–28°C) |
| pH | 6.5–7.0 |
| GH | 3–8 dGH |
| Diet | Omnivore (pellets, flakes, frozen/live food) |
| Temperament | Semi-aggressive (predatory to small fish) |
| Breeding | Egg-layer, pair bonds for life |
| Difficulty | Intermediate (3/5 on beginner-friendly scale) |
Freshwater angelfish (Pterophyllum scalare) are among the most recognizable and elegant aquarium fish. Their tall, diamond-shaped bodies and graceful fins make them the centerpiece of many tropical tanks. But behind that peaceful appearance lies a predatory cichlid that will eat any fish small enough to fit in its mouth.
Why Angelfish Are Special
Angelfish are South American cichlids native to the Amazon River basin. Their unique disc-shaped body and long flowing fins are adaptations for navigating slow-moving, heavily planted waters. They are ambush predators in the wild, hiding among vegetation and striking at small fish and invertebrates.
In the aquarium, their elegant appearance and interactive personality (they recognize their owners and will approach the glass during feeding time) make them one of the most rewarding fish to keep. However, they require more attention than beginner species like guppies or goldfish — particularly in tank mate selection and water quality management.
Tank Setup
Tank Size and Shape
Angelfish grow tall (up to 8 inches in height) and need vertical swimming space. This is one fish where tank height matters more than length.
| Tank Size | Angelfish Count | Notes |
|---|---|---|
| 29 gallons (tall) | 1–2 | Minimum viable — tall format essential |
| 30–40 gallons | 2–3 | Good starter size for a small group |
| 55 gallons | 4–6 | Ideal — plenty of vertical and horizontal space |
| 75+ gallons | 6+ | Breeding setup or mixed cichlid community |
A 55-gallon standard (48” x 13” x 20”) is the sweet spot. A 40-gallon breeder (36” x 18” x 16”) also works well because of the extra width for territory.
Equipment
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Filter: A high-quality HOB or canister filter with gentle to moderate flow. Angelfish prefer slow-moving water — avoid powerheads or wavemakers. A sponge pre-filter on the intake prevents fins from getting sucked in.
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Heater: Angelfish need warm, stable temperatures (78–82°F). An adjustable 200W heater with a digital thermostat is recommended for 30–55 gallon tanks. Temperature fluctuations below 75°F stress angelfish and trigger disease.
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Lighting: Moderate to low lighting. Bright light makes angelfish skittish and washes out their colors. Floating plants help diffuse harsh lighting.
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Substrate: Fine sand or small, smooth gravel. Dark substrates make silver angelfish colors pop.
Aquascaping
Angelfish come from densely planted Amazonian waters. Recreate this with tall plants like Amazon swords, Vallisneria, and Java fern. Vertical plants complement the angelfish’s tall body shape and provide spawning surfaces.
Driftwood is highly recommended — it releases tannins that slightly lower pH (beneficial for angelfish) and provides natural hiding spots. See our aquarium plants guide for suitable species.
Water Parameters
Angelfish prefer soft, slightly acidic water similar to their Amazon basin origins. While they adapt to a range of conditions, maintaining their preferred range ensures optimal health and color.
Ideal Parameters
| Parameter | Ideal Range | Acceptable Range |
|---|---|---|
| Temperature | 78–82°F (26–28°C) | 75–85°F (24–29°C) |
| pH | 6.5–7.0 | 6.0–7.5 |
| GH (General Hardness) | 3–8 dGH | 2–12 dGH |
| KH (Carbonate Hardness) | 3–6 dKH | 2–10 dKH |
| Ammonia | 0 ppm | 0 ppm (always) |
| Nitrite | 0 ppm | 0 ppm (always) |
| Nitrate | < 20 ppm | < 40 ppm |
Water Hardness
Angelfish kept in very hard water (above 12 dGH) may develop kidney problems over time and produce fewer viable eggs during breeding. If your tap water is very hard, consider mixing with RO (reverse osmosis) water or adding driftwood/Indian almond leaves to naturally soften it.
Tank setup must be fully cycled before adding angelfish — they are sensitive to ammonia and nitrite spikes.
Diet and Feeding
Angelfish are carnivorous by nature. In the wild, they eat small fish, insects, worms, and crustaceans. In captivity, they accept a varied diet but should receive regular protein-rich foods.
Staple Diet
Feed high-quality cichlid pellets or flakes formulated for medium-sized cichlids. Avoid floating pellets — angelfish prefer to feed mid-water, and gulping food from the surface can cause swim bladder issues.
Supplemental Foods
| Food Type | Frequency | Benefit |
|---|---|---|
| Frozen bloodworms | 2–3x per week | Favorite food, excellent protein source for conditioning |
| Frozen brine shrimp | 1–2x per week | Good variety, helps with digestion |
| Mysis shrimp | 1x per week | High protein, natural color enhancer |
| Blackworms | 1x per week | Excellent breeding conditioning food |
| Blanched spinach | 1x per week | Plant matter, vitamins |
| Spirulina flakes | 2–3x per week | Color enhancement, digestion |
Feeding Guidelines
Feed 1–2 times per day, only what they consume in 60 seconds. Angelfish are greedy eaters and will beg for food even when full — do not overfeed. Uneaten food pollutes water and causes bacterial issues that affect angelfish fins first.
Tank Mates
This is the most critical aspect of angelfish care. Angelfish are predators that will eat any fish small enough to fit in their mouth. This eliminates most popular community fish.
Safe Tank Mates
- Corydoras: Bottom-dwelling catfish that are too large to eat and share similar water parameters. Peaceful and active.
- Bristlenose Plecos: Armored bottom dwellers that stay small (4–5 inches). Safe from angelfish.
- German Blue Rams: Dwarf South American cichlids with matching water requirements. Keep one pair with your angelfish group.
- Larger Tetras: Cardinal tetras (larger than neons at 2 inches), emperor tetras, and bleeding heart tetras can work. Avoid neon tetras — they will be eaten.
- Kuhli Loaches: Peaceful bottom dwellers that stay hidden during the day.
Tank Mates to Avoid
- Neon Tetras: The single most common mistake. Adult angelfish WILL eat neon tetras. They are the same size as natural angelfish prey.
- Guppies: Too small, too slow — guaranteed to be eaten.
- Cherry Shrimp: Expensive angelfish food.
- Betta Fish: Both are territorial cichlids. Fin damage and stress for both.
- Oscars: Too large and aggressive — will dominate or eat angelfish.
Behavior and Social Structure
Angelfish are social fish that establish hierarchies within groups. In a group of 6 or more, the pecking order distributes aggression across multiple fish. In pairs or small groups, the dominant fish may bully subordinates relentlessly.
Pair Bonding
Angelfish often form monogamous pairs that stay together for life. Breeding pairs become highly territorial — they will defend a spawning site aggressively against all other fish. If you notice a pair cleaning a flat surface (leaf, filter tube, glass), they are preparing to spawn.
A breeding pair in a community tank will terrorize other fish. Remove the pair to a separate 20-gallon breeding tank once spawning begins.
Breeding
Angelfish breeding is relatively straightforward compared to other cichlids, which is why they are one of the most commonly bred freshwater fish.
Sexing Angelfish
Difficult until maturity. Males tend to have a more pointed genital papilla (breeding tube), while females have a wider, rounded one. During spawning, the female’s tube is visibly wider than the male’s.
Spawning Process
- A bonded pair selects a flat, vertical surface (broad leaf, slate, filter tube, or glass)
- The female lays 100–500 eggs in rows on the surface
- The male follows and fertilizes each row of eggs
- Both parents fan the eggs with their fins and remove unfertilized (white) eggs
- Eggs hatch in 48–72 hours, wigglers become free-swimming in 5–7 days
Fry Rearing
Newly free-swimming fry can eat baby brine shrimp or micro-worms. Feed 4–5 small meals per day. Grow-out takes 4–6 months before juvenile angelfish are ready to sell or move to the main tank.
Some angelfish pairs eat their own eggs or fry — this is common with first-time parents. Subsequent spawns usually improve.
Common Health Issues
| Disease | Symptoms | Cause | Treatment |
|---|---|---|---|
| Ich (White Spot) | White dots, rubbing, clamped fins | Parasite (Ichthyophthirius) | Raise temp to 86°F over 24h + API Super Ick Cure, add aquarium salt |
| Hole in the Head | Pitting lesions on head/lateral line | Hexamita parasite, poor nutrition | Metronidazole (API General Cure), improve diet with variety |
| Dropsy | Bloated body, raised scales | Internal bacterial infection | Quarantine, Epsom salt baths, Kanaplex — often fatal if advanced |
| Fin Rot | Frayed, translucent fins | Bacterial (poor water quality) | Clean water, API Fin & Body Cure, temperature 82°F |
| Pop-Eye | One or both eyes protruding | Bacterial infection or physical injury | API General Cure, pristine water, Epsom salt — resolve underlying cause |
| Velvet Disease | Gold-yellow dust, clamped fins, scratching | Parasite (Oodinium) | API Super Ick Cure + aquarium salt, darken tank for 3 days |
| Bloat | Swollen belly, loss of appetite | Overfeeding, bacterial, internal parasites | Fast 2–3 days, then feed daphnia/peas; API General Cure if bacterial |
Prevention
- Maintain stable temperature — angelfish are sensitive to cold. Keep at 78–82°F consistently
- Weekly 25% water changes with a water test kit to monitor parameters
- Quarantine new fish for 2–3 weeks — angelfish are susceptible to parasites from unquarantined tank mates
- Feed varied diet — monotonous diet contributes to Hole in the Head and weakened immunity
- Don’t keep with small fish — stress from constant predatory behavior weakens both the angelfish and their tank mates
Angelfish Varieties
Angelfish have been selectively bred into over 20 color and pattern varieties. The most popular include:
Body Pattern Varieties
- Silver: Wild-type coloration — silver body with 4 vertical dark bars. The hardiest and most common variety.
- Gold: Yellow-orange body, usually without vertical bars. Hardier than most fancy varieties.
- Marbled: Mix of silver, black, and gold patches in irregular patterns. Each fish is unique.
- Black: Deep black body, striking contrast. Can be all-black or with silver highlights.
- Zebra: Silver body with extra bold, wide vertical stripes.
- Leopard: Spotted pattern over silver or gold base.
Specialty Varieties
- Koi: Red/orange, white, and black pattern — resembles koi coloring. Very popular.
- Albino: White body with pink eyes. Needs dimmer lighting.
- Ghost: Translucent with minimal pigmentation.
- Blushing: Silver body with pink/reddish gill area — the “blush” is visible gill coloration through semi-transparent scales.
- Chocolate: Rich brown coloring.
- Egyptian: Deep black with gold highlights, elongated fins.
Fin Varieties
- Standard: Normal dorsal, anal, and caudal fins
- Veil: Extremely long, flowing fins — beautiful but more prone to fin damage
- Super Veil: Even more exaggerated fin length — requires pristine water to prevent fin rot
Veil and super veil varieties are more susceptible to fin damage from aggressive tank mates and fin rot from poor water quality. Keep in species-only or very peaceful setups.
Angelfish Care FAQ
Q Can angelfish live with neon tetras?
No. Adult angelfish will eat neon tetras — they are natural prey. While some aquarists report success with very large neon tetras in very large tanks, this is the exception, not the rule. Choose larger tetra species like cardinal tetras or bleeding heart tetras instead.
Q How many angelfish should I keep together?
Keep at least 3, preferably 5–6. Angelfish are social cichlids that establish hierarchies. A single angelfish becomes aggressive. Groups of 5+ distribute aggression naturally. In a 55-gallon tank, 5–6 angelfish is ideal. Avoid keeping just 2 — the dominant fish will bully the other constantly.
Q What size tank do angelfish need?
Minimum 30 gallons (tall format preferred) for 2–3 angelfish. A standard 55-gallon is ideal for a group of 5–6. Angelfish grow tall (up to 8 inches) and need vertical swimming space. Tall tanks are more important than long tanks.
Q Do angelfish need a heater?
Yes. Angelfish are tropical fish requiring 78–82°F (26–28°C). An [adjustable heater](https://www.amazon.com/dp/B09P7D8SN3?tag=tank101-20) is essential unless your home maintains this temperature year-round. Temperature drops below 75°F stress angelfish and trigger Ich outbreaks.
Q What do angelfish eat?
High-quality cichlid pellets or flakes as the daily staple, supplemented with frozen bloodworms, brine shrimp, and mysis shrimp 2–3 times per week. They are primarily carnivorous and need regular protein. Avoid feeding mammal meat or bread.
Q How long do angelfish live?
8–12 years in a well-maintained aquarium. They reach adult size (6+ inches) by 6–9 months of age. Lifespan depends on water quality, diet variety, and low-stress environment. Poor conditions reduce lifespan to 3–5 years.
Q Are angelfish aggressive?
Semi-aggressive. They are peaceful toward fish their own size or larger, but will eat any fish small enough to fit in their mouth. During breeding, pairs become highly territorial and may attack other tank mates. This is normal cichlid behavior, not a temperament flaw.
Q Can angelfish live with betta fish?
No. Both are territorial cichlids with different water temperature preferences. Angelfish will likely fin-nip the betta, and bettas will fight back. This combination causes stress and injury to both fish.
Q Why is my angelfish hiding all the time?
Common causes: new environment (give 1–2 weeks to adjust), bullying by dominant angelfish (add more to spread aggression), bright lighting (add floating plants to diffuse), lack of hiding spots (add tall plants and driftwood), or illness (check for clamped fins, white spots, or abnormal swimming).
Recommended Setup for Beginners
| Item | Product | Price | Why |
|---|---|---|---|
| Tank | SeaClear 40-Gallon Combo | $179.99 | Tall acrylic tank, vertical space for angelfish |
| Filter | Aqueon QuietFlow PRO 55 | $47.49 | Gentle flow, sufficient for 30-55 gallon setup |
| Heater | hygger Adjustable 200W | $22.99 | Stable tropical temperature control |
| Test Kit | API Freshwater Master Kit | $34.23 | Essential for monitoring soft water conditions |
| Food | Omega One Super Color Flakes | $12.99 | Natural color enhancement, quality ingredients |
| Treats | Hikari Bloodworms | $15.98 | Premium frozen food for conditioning and variety |
| Conditioner | Seachem Prime | $14.99 | Best-in-class dechlorinator for water changes |
Total estimated startup cost: $327–370 (excluding substrate and plants)
What to Read Next
- Neon Tetra Care Guide — common but incompatible tank mate (prey item)
- Guppy Care Guide — another species angelfish will eat
- Betta Fish Care Guide — incompatible cichlid, different temperament
- Ich White Spot Disease — the most common angelfish disease
- Fin Rot — frequent issue with veil varieties
- How to Cycle a Fish Tank — must-do before adding angelfish
- Aquarium Plants Guide — plants that complement angelfish
- Stocking Calculator — plan your angelfish community tank
