Betta Fish Care in the UAE (2026): Tank, Heater, Food and Health
Everything you need to keep a betta (Siamese fighting fish) healthy in a UAE home: why a bowl isn't enough and what size tank to buy, why bettas need a heater in air-conditioned rooms, feeding, which fish can share the tank, keeping the water clean, common illnesses and what a setup costs in AED.
The betta, also called the Siamese fighting fish, is one of the most popular aquarium fish in the UAE. It's colourful, full of character and easy to keep well, but it is a tropical fish that needs a proper tank, a heater and clean water, not a bowl on a shelf. This guide covers what a betta needs in a UAE home: the right tank, keeping the water warm in air-conditioning and cool in summer, feeding, tankmates, health and what it costs to set up.
Last checked 29 October 2026.
The betta fish at a glance
A betta is a small, hardy tropical fish from the shallow, warm waters of South-East Asia. Males are famous for their long fins and bright colours, and for fighting other males.
| Trait | What to expect |
|---|---|
| Size | About 6cm long as an adult, not counting the tail |
| Lifespan | Usually 3–5 years, and occasionally much longer with excellent care |
| Tank | At least 19 litres, heated and filtered, with a lid. Bigger is easier to keep stable |
| Water | About 25–28°C, pH around 6.8–7.5, gentle flow |
| Diet | A meat eater: betta pellets, with frozen bloodworm or brine shrimp as treats |
| Company | Never keep two males together. Some peaceful community fish can share a larger tank |
Sources: PetMD; Aqueon betta care guide.
Choosing a betta tank: why a bowl isn't enough
Bettas can breathe air from the surface using a special labyrinth organ, which is why they survive in small cups and bowls in shops. Surviving isn't thriving. In a small, unheated bowl the water cools, waste builds up quickly and the fish is far more likely to fall ill.
- Size: aim for at least 19 litres (5 US gallons). PetMD suggests about 38 litres as ideal. More water stays warmer, cleaner and more stable, and is actually less work. The Fluval Spec 19L kit and the larger Fluval Flex 2.0 34L kit both come with a built-in filter and light. See all fish tanks and aquarium kits.
- A lid: bettas jump. Choose a covered tank, and leave a small gap of air above the water so the fish can breathe at the surface.
- Gentle filtration: a filter keeps the water clean, but long fins struggle in strong current. Turn the flow down, or baffle the outlet with a sponge. See aquarium filters.
- Soft decor and plants: live or silk plants and smooth ornaments give hiding places without tearing fins. Bettas love resting on broad leaves near the surface. Browse aquarium decor.
Set the tank up before you buy the fish. A new filter needs a few weeks to grow the bacteria that break down waste (the nitrogen cycle). Test the water and add your betta only once ammonia and nitrite read zero. Our beginner's guide to setting up a tropical fish tank walks through it step by step, and water test kits take the guesswork out.
Water temperature in the UAE: heater in, sun out
It surprises many UAE owners, but a betta usually needs a heater here. Most of us keep the air-conditioning at around 22–24°C, and a small tank settles at room temperature. That's too cool for a tropical fish that does best at about 25–28°C. Cold bettas become sluggish, stop eating and pick up infections.
- Use a small, reliable heater. The Fluval P25 nano heater is pre-set to 24–26°C and suits tanks up to about 25 litres. For a slightly bigger tank, see our aquarium heaters.
- Add a thermometer and check it daily. It's the quickest way to spot a heater that has failed or a room that is overheating.
- Keep the tank out of direct sun. A tank by a window can overheat within hours in a UAE summer, and sunlight also feeds algae.
- Plan for summer. A heater can warm water but can't cool it. If the AC is switched off while you travel, or fails, the room and the tank can climb well above 30°C. Keep the AC running, or arrange for someone to check the tank.
Tap water in the UAE is treated to make it safe for people, and that treatment harms fish. Add a water conditioner every time you fill or top up the tank, such as API Betta Water Conditioner, which removes chlorine, chloramine and heavy metals. See all water conditioners.
What to feed a betta fish
Bettas are carnivores that feed at the surface. They need a high-protein food made for bettas, in very small amounts.
- A betta pellet or granule as the staple, such as Sera Bettagran Nature or Atison's Betta Pro.
- Treats a few times a week: frozen bloodworm or brine shrimp, thawed first. See our 3F&RUTO frozen fish food.
- Feed a portion about the size of its eye, once or twice a day. Everything should be eaten within two minutes. Scoop out leftovers.
- Don't overfeed. It's the most common mistake. Excess food fouls the water, and overfed bettas often bloat or float awkwardly. Many keepers skip feeding one day a week.
Our guide to the best fish food in the UAE compares flakes, pellets and frozen food for every kind of fish.
Can bettas live with other fish?
Never keep two male bettas together. They are highly territorial and will fight, often to the death. Even seeing another male through the glass can stress them, so don't place two tanks side by side.
A male betta is happiest alone in a tank of 19–38 litres. In a larger, well-planted community tank of about 57 litres (15 US gallons) or more, some calm fish can work, such as small tetras, rasboras, Corydoras catfish or snails. Avoid fin-nippers like tiger barbs, fast swimmers and other long-finned or labyrinth fish such as male gouramis. Watch closely for the first few days and have a backup tank ready.
Groups of female bettas are sometimes kept, but they fight too and need a large, densely planted tank and experience. We don't recommend it for a first betta.
Keeping the water clean
Clean, stable water prevents most betta illnesses. In a filtered tank:
- Change about 10% of the water every week, or 25% every two weeks. Never change all the water at once, as it shocks the fish and removes useful bacteria.
- Treat and warm the new water to roughly the same temperature as the tank before adding it.
- Vacuum the gravel as you siphon to lift out waste and old food. See aquarium cleaning supplies.
- Rinse filter media in old tank water, not tap water, so you don't kill the bacteria living in it. Replace cartridges as the maker advises.
Betta health: signs to watch for
A healthy betta is alert, eats eagerly, has bright colour and holds its fins open. Most problems start with poor water or cold, so test the water and check the temperature first.
- Fin rot: ragged, shrinking or dark-edged fins. Usually caused by dirty water.
- White spot (ich): tiny white grains on the body and fins, often after a temperature drop.
- Velvet: a gold or rusty dust on the skin, with clamped fins and rubbing against objects.
- Bloating or floating sideways: often linked to overfeeding or constipation. Fast for a day or two.
- Lethargy and lying on the bottom: check the heater and the water first.
Treat early with the right product from our fish medicine and healthcare range, and follow the dose on the pack. For a fish that keeps getting worse, look for a vet who treats fish and exotic pets. Our guides to vets in Dubai and Abu Dhabi list clinics, so call ahead and ask.
What a betta setup costs in the UAE
The fish is the cheap part. Most of the cost is a one-off for the tank and heater, and running costs after that are small.
| Item | The Pets Club price (28 Oct 2026) |
|---|---|
| Tank kit with filter and light | AED 722.51 for the Fluval Spec 19L, or AED 734 for the Fluval Flex 2.0 34L |
| Heater | AED 95 for the Fluval P25 (25W) |
| Water conditioner | AED 24.50 for API Betta Water Conditioner (50ml) |
| Food | From AED 10 for Sera Bettagran Nature (10g), which lasts a single betta a long time |
| Extras | A thermometer, a test kit, plants and decor. Budget a few hundred dirhams |
Prices change, so check the product pages. Live bettas are sold by aquarium shops across the UAE, and the price depends on the variety.
Choosing a healthy betta
- Have the tank ready and cycled before you buy, so the fish goes straight into a warm, stable home.
- Pick an active fish that swims to the front of its cup, with bright colour and clear eyes.
- Check the fins and body. Avoid fish with torn or dark-edged fins, white spots, a dusty sheen or a bloated belly.
- Bring it home quickly in an insulated bag, away from the sun and car heat. Float the bag in the tank for 15–20 minutes so the temperatures match before you release it.
Your betta shopping list
- A tank kit of 19 litres or more, with a lid and gentle filter
- A heater and thermometer
- A water conditioner and a water test kit
- Betta pellets and some frozen food for treats
- Plants and smooth decor for resting and hiding
- A siphon and cleaning supplies
Betta fish FAQs
Does a betta fish need a heater in the UAE?
Usually, yes. Bettas do best at about 25–28°C, and most UAE homes keep the air-conditioning at 22–24°C, so a small tank settles too cool. A small pre-set heater and a thermometer keep the water steady. Keep the tank out of direct sun, as a heater can warm water but can't cool it.
What size tank does a betta fish need?
At least 19 litres (5 US gallons), heated and filtered, with a lid. Around 38 litres is ideal. A betta can survive in a small bowl because it breathes air at the surface, but larger tanks stay warmer, cleaner and more stable, and are easier to look after.
Can two betta fish live together?
Never keep two male bettas together, as they fight, often to the death. A male is happiest alone. In a large, planted community tank of about 57 litres or more, some calm fish such as small tetras, rasboras or Corydoras can share with a betta.
How long do betta fish live?
Most bettas live three to five years, and some live much longer with excellent care. Clean, warm water, a varied high-protein diet and not overfeeding make the biggest difference.
What do betta fish eat?
Bettas are meat eaters that feed at the surface. Feed a betta pellet or granule as the staple, with thawed frozen bloodworm or brine shrimp a few times a week. Give a portion about the size of its eye once or twice a day, and remove anything not eaten within two minutes.
