Betta care: what a family needs to know
Ask your vet about your own pet. This page is general information from the sources below.
Betta care, from RSPCA and others on this page. RSPCA notes that betta types bred with very heavy 'rose-tail' fins can have health problems from the weight of their tails. Fish are watched more than cuddled, and RSPCA warns that they are easy to harm with poor water. CDC says children younger than 5 should not clean or handle aquarium items. The sources do not give a betta menu.
Checked October 29, 2026.
Home
RSPCA says a tropical fish tank needs a heater with a thermostat, a well set-up filter, and a tank bigger than 45 x 30 x 30 cm (about 40 litres) in general. Merck says very small betta tanks may not need a filter, but then the water must be changed more often, in some cases as much as 50% per week. The two sources do not agree, so ask an aquarium or exotics vet before setting up.
Food
The sources do not give a betta menu. RSPCA says to buy food that suits your fish's species, feed only what it can finish in two to five minutes, and know that feeding too little is safer than feeding too much because dirty water is the bigger danger.
Company
RSPCA says some tropical fish are not social and will fight their own kind, such as male bettas, or other fish in the same tank.
Is it a good pet for children?
Fish are watched more than cuddled, and RSPCA warns that they are easy to harm with poor water. CDC says children younger than 5 should not clean or handle aquarium items. A grown-up must do the tank work and water checks.
Washing hands
Wash hands with soap and running water before and after touching the fish or tank gear, and after cleaning the tank. CDC says tank water and equipment can carry germs, so you don't have to touch the fish to get sick.
The vet
Ask a vet who knows fish for help if you are worried, and buy only from a place that can say where the fish came from.
Good to know
RSPCA notes that betta types bred with very heavy 'rose-tail' fins can have health problems from the weight of their tails.
A job for the children
With a grown-up, count out the food and watch the fish eat for a few minutes, then help write the water-check day on a calendar.
"A grown-up is the real carer for bettas. Our job is the small, steady part."
Betta fish facts
Betta fish: facts from the sources below, in the sources' own words.
- Left-over food sinks and leads to poor water quality.
- If the water is too cold, tropical fish are known to swim slowly.
Betta card
A betta is a small, warm-water fish that breathes air, lives alone and needs a grown-up to run its tank.
- Home. A wide tank of 5 gallons or more, not a bowl. Smooth decorations, plants to hide in, and room to swim.
- Food. A balanced pellet or flake food once a day. Treats like bloodworms now and then. Plants are not food.
- Water. Warm, calm water, about 76 to 81 F. A grown-up treats tap water first. Low-flow filters keep fins safe.
- Every day. Check the thermometer. Feed only what he can eat in 3 to 5 minutes. Watch how he swims and eats.
- Every week. A grown-up changes some water and cleans the tank. Ask a fish vet how often for your tank.
- Handling. Mostly look, talk and watch. Wash hands before and after touching or caring for fish. Under 5s do not handle tank things.
- Happy signs. Swims around, comes to the glass when you walk up, eats eagerly, and holds his fins out, not folded.
- Tell a grown-up if. He lies still, stops eating, seems cold or slow, or his fins look torn. A fish vet knows what to do.
Jobs to tick, with a grown-up
- Check the thermometer each day and tell a grown-up if it looks wrong
- Feed the right amount with a grown-up nearby
- Watch how your betta swims and eats, and tell a grown-up about changes
- Wash your hands after feeding
- Say hello and give him something new to look at
Wash your hands with soap and running water before and after touching or caring for fish, after feeding, after cleaning the tank, and before eating.
Poison emergency? Call now
ASPCA Animal Poison Control: (888) 426-4435, 24 hours a day, every day. A consultation fee may apply.
Pet Poison Helpline: (855) 764-7661, 24/7. $99 per incident, follow-up calls included.
Or call your vet or the nearest emergency vet.
Every pet is different, and this is general information from the sources below, not veterinary advice. For a sick or hurt pet, call a vet who knows this kind of animal.
Sources
- RSPCA: Keeping fish as pets (checked October 29, 2026)
- RSPCA: Choosing an aquarium for pet fish (checked October 29, 2026)
- RSPCA: Keeping pet fish together (checked October 29, 2026)
- Merck Veterinary Manual: Providing a home for fish (checked October 29, 2026)
- CDC: Healthy Pets - Fish (checked October 29, 2026)