Best Low-Maintenance Aquarium Fish for Beginners
Good low-maintenance fish for beginners include bettas (one per tank of at least 5 gallons), livebearers such as guppies, platys and mollies, neon and other small tetras, zebra danios, corydoras catfish and hardy gouramis. Goldfish are hardy but need a large, well-filtered tank. Whatever you choose, research its size, temperament and water needs first.
"Low-maintenance" doesn't mean "no maintenance": every aquarium needs regular feeding, water changes and testing. But some fish tolerate beginner mistakes far better than others. This list follows Chewy's veterinarian-reviewed guide to beginner fish.
10 beginner-friendly aquarium fish
| Fish | Tank size | Temperament | Typical lifespan | Notes |
|---|---|---|---|---|
| Betta | At least 5 gallons, filtered, heated | Keep alone (males fight) | 3–5 years (Chewy's lifespan article cites 5–7 with good care) | Colorful, interactive |
| Goldfish | 20–30 gallons for one | Peaceful | 8–20 years | Messy; needs strong filtration; no heater indoors |
| Livebearers (guppies, platys, mollies, swordtails) | Moderate community tank | Peaceful | 5–7 years | Breed readily |
| Tetras (neon, cardinal and others) | Community tank | Peaceful schooling fish | 2–5 years | Keep in groups |
| Danios | Community tank | Peaceful, active | 3–5 years | Groups of 6+; tolerate slightly cooler water |
| Corydoras catfish | Community tank | Peaceful | 3+ years | Bottom feeders; fine, smooth substrate |
| Gouramis (pearl, honey, dwarf, sparkling) | 20 gallons or more | Generally peaceful | about 7–8 years | Males may squabble in small tanks |
| Barbs | Community tank | Active; some nip fins | up to 15 years | Groups of 5+ with fast swimmers |
| Angelfish | Tall tank | Peaceful | 10–15 years | Fins grow tall; planted tanks |
| Loaches (kuhli, yoyo, clown) | Larger tanks for groups | Peaceful scavengers | 10–15 years | Some grow large (clown loach) |
Source: Chewy (Kate Barrington, with Teresa Manucy, DVM), updated April 2026.
The easiest setups for a first tank
- Single betta in a filtered, heated 5-gallon (or larger) tank.
- Small community tank (20 gallons or more) with a school of tetras or danios, a few platys, and a group of corydoras on the bottom.
A bigger tank is actually easier than a small one: waste is diluted, so water quality changes more slowly.
Beginner tips
- Choose fish before equipment, so you get the right tank size, heater and filter.
- Check your water: soft tap water may not suit hard-water species, and vice versa.
- Feed once or twice a day, only what the fish eat in two to three minutes.
- Test water weekly and do regular partial water changes. See how often to clean a fish tank.
- Add fish gradually so the filter's bacteria can keep up.
- Check compatibility: bettas and fin-nippers (some barbs) don't mix with long-finned fish.
Fish that aren't beginner-friendly
Goldfish are often sold as starter fish, but they grow large and produce a lot of waste. PetMD recommends about 20 gallons per goldfish and a filter that turns over the tank at least five times per hour. Fish bowls without filters are not suitable for any of the fish above.
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This article is general information for pet owners, not veterinary, legal or financial advice. Prices vary by city and clinic; always ask your veterinarian or provider about your own pet.
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