Betta Fish FAQ: 15 Owner Questions Answered
Bettas are the most-sold fish in Singapore and the most misunderstood, with cup-housed shop fish setting expectations that span the gulf between marketing and reality. The betta fish faq below answers the questions our staff hear most often, in the order new keepers ask them. This betta fish faq draws on years of betta-specific consultations at Gensou Aquascaping in 5 Everton Park. Each question is a standalone reference; this guide answers the eleven questions Singapore aquarists ask most about bettas.
What Tank Size Does a Betta Actually Need?
Twenty litres minimum, filtered and heated, is the genuine baseline despite shop cup marketing. Bettas in 5-litre jars survive but show stress colours, develop fin rot, and live half their potential lifespan. A 30-40 litre planted tank with gentle filtration is the sweet spot for showing off colour and natural behaviour. Betta splendens in the wild patrol large rice paddies, not puddles.
How Long Do Bettas Live?
Three to five years in proper conditions. Shop bettas are typically eight to twelve months old at purchase, so a fish you bring home today should reach 2026-2028 with adequate care. Heavily-bred show lines often hit only two to three years because of compromised genetics. Wild-type bettas in well-kept tanks routinely cross five.
Can Bettas Live With Other Fish?
Yes, with careful selection. Avoid anything brightly coloured, finnage-heavy, or aggressive — guppies, dwarf gouramis, other bettas. Safe options include corydoras, kuhli loaches, otocinclus, ember tetras in groups of eight or more, and Amano shrimp. The 30-litre minimum becomes mandatory when adding tank mates. Female sororities work in 60 litres with six or more.
Do Bettas Need a Heater in Singapore?
Usually no. Singapore ambient runs 28-31°C which sits inside the betta tropical range. A heater becomes necessary only in air-conditioned rooms running below 24°C overnight. Most HDB tanks track room temperature naturally. A small heater set to 26°C as a safety floor is reasonable insurance for around $25-40.
What Should I Feed My Betta?
Bettas are obligate carnivores — high-protein pellets as staple, with frozen bloodworm, brine shrimp and daphnia rotated as enrichment. Skip flake food which oversaturates and causes constipation. Feed three to four pellets twice daily and fast one day weekly. The fish food range stocks Hikari Betta Bio-Gold and JBL ProNovo Betta which are the proven staples.
Why Are Betta Cups So Small?
Cups are a wholesale shipping convenience, not a long-term home. Bettas tolerate brief crowded transit because their labyrinth organ lets them breathe surface air, but cup conditions cause chronic stress within a fortnight. The cup is a stop on the way to a proper tank, never the destination.
What Plants Are Best for Bettas?
Live plants help significantly — they oxygenate, reduce nitrate, and provide cover that lowers stress. Anubias, java fern, hornwort and floating frogbit are foolproof. Avoid sharp-leaved plants like Vallisneria where finnage can snag. Floating plants are particularly valued because bettas like to rest among the roots.
How Do I Know If My Betta Is Stressed?
Stress signs include faded colour, clamped fins, lethargy, refusing food, surface gasping, and stress stripes — pale horizontal bands across the body. Compare against the fish on day one of ownership. Persistent symptoms point to water quality, temperature, or aggression issues. Most stress resolves within a week of fixing the cause.
Can I Keep Two Male Bettas Together?
Never. Two males in any tank size will fight to death — this is the trait that gives the species its common name, the Siamese fighting fish. The only male cohabitation that works is in dividers within a long tank, with sight blockers between sections. Females tolerate one another in carefully managed sororities.
How Often Should I Change the Water?
Twenty-five to thirty per cent weekly in a filtered 30-litre tank. Unfiltered jars need fifty per cent twice weekly minimum and still produce stressed fish. Use the water care range for dechlorinator on every change. PUB tap water suits bettas straight out the conditioner once chloramine is neutralised.
Should I Quarantine a New Betta?
For solo bettas going into a new tank, no — the new tank IS the quarantine. For bettas joining an existing community, quarantine three weeks in a separate 10-litre tub with a sponge filter primed in the destination tank. Catches velvet, ich and fin rot before they reach existing stock.
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Drop by Gensou Aquascaping — most walk-in questions get answered in under 10 minutes by someone who has set up hundreds of tanks.
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