Guppy (Fancy) Tank Mates

Guppies are hardy, peaceful livebearers that mix happily with most small, calm community fish.

Their one vulnerability is their long, colourful tails, which fin-nippers like tiger barbs will shred. Otherwise guppies are unusually easy to stock around — the engine clears most peaceful community species, from corydoras to small tetras and dwarf cichlids. Plan for breeding: a mixed-sex group multiplies fast.

Guppy (Fancy) key facts

The sourced figures the engine uses to judge Guppy (Fancy) pairings.

Top Guppy (Fancy) tank mates

A ranked shortlist: the species the engine clears with Guppy (Fancy) and that suit its size and temperament best — tap a name for its care guide, or use + Add to test the pairing in the planner.

No tank mates match these filters — try removing one. Reset filters

Other engine-cleared options (not necessarily ideal)

These clear TankStocking's hard welfare checks with Guppy (Fancy), but are larger, bolder, or otherwise less ideal than the shortlist above — read up before committing.

Possible with care

These can work, but the engine flags something to watch — read the reason before you commit.

• Betta (Siamese Fighting Fish) — Territorial
• Cockatoo Dwarf Cichlid (Apisto Cacatuoides) — Territorial
• Convict Cichlid — Aggression
• Jewel Cichlid — Aggression
• Kribensis (Rainbow Krib) — Territorial

Best avoided

A hard welfare check fires for each of these — don't mix them with Guppy (Fancy).

• Chocolate Gourami — Species-only fish
• Kissing Gourami — Predation risk
• Licorice Gourami — Species-only fish
• Paradise Fish — Aggression, Fin-nipping
• Snakeskin Gourami — Predation risk
• Bala Shark — Predation risk
• Denison Barb (Roseline Shark) — Fin-nipping
• Odessa Barb — Fin-nipping
• Rosy Barb — Fin-nipping
• Tiger Barb — Fin-nipping
• Tinfoil Barb — Predation risk
• Discus — Temperature clash
• Electric Blue Acara — Predation risk
• Firemouth Cichlid — Predation risk, Territorial

Keeping Guppy (Fancy) well: the detail

Beyond the table — the behaviour, the parameters that actually move the needle, and the mistakes that cost fish. Hobbyist context, not a verdict; the planner above is what judges your plan.

Water parameters in practice

Guppies are a hard-water fish — the mirror image of tetras. They thrive in moderately hard to hard, alkaline water (GH roughly 10–25 dGH, pH 7.2–8), which is the very tap water soft-water keepers struggle with, so leave it hard rather than softening it. They are hardy overall, but fancy long-finned strains are less robust than their wild-type ancestors and resent neglected water.

Why Guppy (Fancy) behaves the way it does

The wild guppy is a small, drab, fast-breeding livebearer from the hard, mineral-rich streams and ditches of north-eastern South America, built to colonise anything and out-reproduce predation. Generations of selective breeding gave us the colour and the trailing fins, but the underlying animal is still a prolific, adaptable survivor. That is why a mixed group multiplies relentlessly and why guppies forgive beginner mistakes other fish would not.

Common Guppy (Fancy) stocking mistakes

The commonest mistake is not planning for fry — a mixed-sex group breeds continuously and a 10-gallon is overrun within months, so keep males only or expect to manage the population. The second is pairing those long tails with fin-nippers like tiger barbs or serpae tetras. The third is keeping more males than females, which leaves females hounded.

Early signs something is wrong

A clamped, shimmying guppy that swims on the spot is showing classic stress; ragged or dissolving tails point to fin rot or nipping, and a thin, hollow-bellied fish with white stringy waste suggests internal trouble. Fancy strains are prone to these, so quarantine new stock — guppies are a frequent route for disease into a clean tank.

How tank size changes the answer

A trio fits a 10-gallon, but the tank fills fast once they breed, so think of 10 gallons as a starter rather than a home for a colony. A 20-gallon holds a proper group with room for fry and a tankmate species, and the extra water keeps quality steady against the livebearer waste load. Males-only groups need the same space — the colour is the point, not the breeding.

Guppy (Fancy) community ideas

Each build is scored by the same engine as the planner — tap one to load it.

Common questions

More on Guppy (Fancy)

Related guides on TankStocking — each scored by the same welfare engine as the planner.

Compatibility is a planning estimate: individual temperament, tank layout, and group sizes all matter. Cycle the tank, add fish gradually, and watch how they behave. See the methodology or browse the full freshwater fish list.