Betta vs Guppy
Two of the most popular beginner fish, with opposite personalities. The betta is a bold solo centrepiece; the guppy is a colourful, social, fast-breeding livebearer. Here's which suits you — and whether they can share a tank.
The quick verdict
Choose the betta fish if you want a single, characterful centrepiece with big personality in a small heated tank. Choose the guppy if you want an active, colourful group and don't mind — or actively want — them breeding. Keeping the two together is possible but risky, so plan carefully.
| Betta | Guppy | |
|---|---|---|
| Care level | Beginner | Beginner |
| Temperament | Territorial | Peaceful, social |
| Min tank size | 19 L / 5 gal | 40 L / 10 gal |
| Kept as | Solo centrepiece | Group (1 male : 2–3 females) |
| Breeding | Not casual (needs setup) | Very easy (prolific) |
| Water | pH 6.5–7.5, 24–27 °C | pH 7.0–8.0, 22–28 °C |
| Diet | Carnivore | Omnivore |
| Best for | One personable show fish | Active, colourful groups |
Solo centrepiece vs busy colourful group
The betta is a slow, flowing, intelligent fish that thrives as the star of a small planted tank — it recognises its keeper and needs no company, which makes stocking wonderfully simple. It's territorial, though, so it can't share with fin-nipping or long-finned tankmates. The guppy is the opposite: a hardy, endlessly active livebearer kept in groups, prized for its colour and its willingness to breed — so much so that a mixed-sex group quickly becomes a crowd. Guppies also prefer harder, more alkaline water than bettas.
Which should you keep?
Our pick
Pick the betta if you want one striking, personable fish in a compact tank with minimal stocking decisions. Pick the guppy if you want a lively, colourful group and enjoy watching a population grow. If you're tempted to combine them, do it only in a larger planted tank and watch closely. Read the full betta fish care guide and guppy care guide, or see how to set up a betta tank.
Frequently asked questions
Can bettas and guppies live together?
Sometimes, but it is risky. Male guppies have long, colourful tails that a betta may mistake for a rival and nip, and a betta can be aggressive in a smaller tank. If you try it, use a well-planted tank of at least 40–75 litres, watch closely, and be ready to separate them. Many keepers avoid the mix and keep each species on its own.
Which is easier for a beginner, a betta or a guppy?
Both are beginner-friendly, but in different ways. A betta is a single centrepiece fish that thrives alone in a small heated tank, so stocking is simple. Guppies are hardy and forgiving too, but they breed prolifically and are kept in groups, so you need to plan for population growth and slightly harder water.
Do bettas and guppies need a heater?
Yes, both are tropical fish that need stable warmth. Bettas like 24–27 °C and guppies do well around 22–28 °C, so a small heater is essential for either in most homes. Stable temperature matters more than hitting an exact number — avoid unheated bowls for both.
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