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1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsGuppies can live with some small, peaceful community fish, but no fish is a safe match just because it appears on a general compatibility list. Compare the specific species’ water needs, adult size, temperament, group requirements and space needs with your guppies and tank. Platies and cory catfish are reasonable candidates to investigate; goldfish are a poor match, and bettas are a risky one.
How to tell whether a fish can live with guppies
Check the particular species rather than relying on a broad label such as “tetra” or “danio.” A suitable pairing needs to work across several factors at once:
- Water conditions: Compare temperature, pH and, when relevant, hardness. Aim for a comfortable overlap in the species’ care guidance and keep the aquarium stable; a single shared boundary value is not a strong match.
- Temperament: Avoid fish known to be aggressive or to nip fins. Guppies’ conspicuous, flowing tails can make them vulnerable to fin-nippers.
- Adult size and feeding behavior: A fish that grows large enough to swallow a guppy is not a suitable tank mate, even if it is peaceful toward fish of its own size.
- Social needs: Check how many of each species should be kept together. A compatible fish still needs the right group size.
- Tank capacity and swimming space: Account for the adults, not just the fish at purchase size. Different swimming zones may reduce crowding, but do not by themselves establish compatibility.
Care references do not give one universal guppy water range. PetMD lists 72–82°F and pH 6.8–7.8; Fluval’s 2022 guppy sheet gives 74–80°F, pH 7.0–8.0 and hardness 6–18 dH; Aquarium Industries’ 2017 Australian retail care sheet gives 24–26°C, pH 7.0–7.5 and general hardness 250–300 ppm. These are source-specific husbandry ranges, not interchangeable guarantees for every strain or community. Compare the guidance for the actual fish you plan to keep and the conditions in your established tank.
Potential guppy tank mates
PetMD’s June 2, 2026 guppy-care article names cory catfish, danios, gouramis, mollies, platies, rainbowfish, rasboras, swordtails and tetras as possible peaceful community companions. Fluval also describes guppies as compatible with small, peaceful species from groups including livebearers, tetras, rasboras, anabantids and bottom dwellers. These are starting points, not blanket endorsements of every species in those groups.
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- Bright Cardinal Tetra Live Fish: Add vibrant blue and red color to your freshwater aquarium with Cardinal Tetras, a classic tropical schooling fish loved for planted and community tanks
- Peaceful Community Aquarium Fish: Cardinal Tetras are calm, active swimmers that pair well with other small peaceful species in properly maintained freshwater aquariums
- Compatible with Community Tanks: Suitable for peaceful freshwater setups with other small, non-aggressive fish such as rasboras, small tetras, corydoras, and other gentle tank mates
- Enhances Planted Aquariums: Cardinal Tetras stand out beautifully against green plants, driftwood, and dark substrate, making them a favorite for aquascaped tanks
- Arrival Care: Fish are carefully selected and packed for safe delivery. Acclimate slowly upon arrival and place into a stable, cycled freshwater aquarium
| Fish | What the care guidance supports | What to check before pairing |
|---|---|---|
| Platies | PetMD includes platies among possible peaceful companions. Petco’s compatibility chart labels both platies and guppies peaceful and gives overlapping temperature ranges. | Check actual pH, adult size and tank capacity. If both sexes are present, plan for livebearer reproduction. |
| Cory catfish | PetMD lists cory catfish as possible companions; Petco describes them as peaceful and recommends groups of three or more. | Choose a particular cory species only after checking its adult size, water needs, substrate and group requirements. |
| Rasboras and danios | Both groups appear in guppy-care guidance as community-fish possibilities. | Confirm the exact species’ adult size, activity level, group needs and water conditions, and whether the tank provides enough swimming room. |
| Tetras | Tetras are included in broad compatibility guidance from PetMD and Fluval. | Do not assume every tetra species fits. Petco’s chart lists neon tetras at pH 6.0–7.0 and guppies at 7.0–8.5, leaving only 7.0 in common. That narrow boundary overlap is not an effortless match; check species-specific guidance and actual stable conditions. |
| Other livebearers, gouramis and rainbowfish | They appear in PetMD’s list of possible peaceful community companions. | These are broad groups. Check the individual fish’s temperament, adult size, social needs and water parameters rather than treating the group name as approval. |
Fish to avoid or treat as high risk
Goldfish: avoid
Goldfish prefer cooler water than guppies, and PetMD warns that they may grow large enough to eat them. The differences in temperature and adult size make goldfish a poor companion choice.
Bettas: not a reliably safe pairing
Fluval’s guppy sheet explicitly says guppies are “Not compatible with Bettas.” Petco describes male bettas as semi-aggressive and cautions against pairing guppies with fin-nippers, but does not establish that guppy-betta combinations are safe. Because the sources do not support a dependable match, the conservative choice is to avoid the pairing rather than count on an individual fish’s temperament.
Rank #2
- Pack of 6 Galaxy Rasboras – Add a beautiful group of Galaxy Rasboras, also known as Celestial Pearl Danios, to your freshwater aquarium for color, movement, and natural schooling behavior.
- Colorful Freshwater Aquarium Fish – Known for their spotted bodies, bright orange-red fins, and active swimming, Galaxy Rasboras bring a unique and eye-catching look to planted aquariums.
- Peaceful Community Fish – These small, calm fish are great for peaceful community tanks with other non-aggressive freshwater species of similar size.
- Perfect for Planted Tanks – Galaxy Rasboras look best in aquariums with live plants, driftwood, rocks, and open swimming areas where they can explore and display natural behavior.
- Carefully Packed for Live Delivery – Each order is prepared with care for safe live fish shipping. Slowly acclimate fish upon arrival before adding them to a fully cycled freshwater aquarium.
Tiger barbs and other fin-nippers or aggressive fish: avoid by default
Fluval cautions against fast-moving, aggressive or larger fish, and Aquarium Industries warns that larger or aggressive fish may nip bright guppy tails. Petco identifies tiger barbs as semi-aggressive and advises avoiding long-finned fish with them. This is especially concerning for long-finned guppies.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Plan the guppies’ group and reproduction
PetMD recommends keeping guppies in groups of three or more. For mixed-sex groups, it recommends two to three females per male. If you keep males and females together, expect reproduction to be part of the stocking plan: Fluval notes that guppies eat their own fry, but that does not make offspring or population growth predictable. Decide whether you have room for additional fish and what you will do if fry survive.
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Best Value
Rank #4
- Live Neon Tetra Freshwater Fish: Includes 10 live Neon Tetras plus 4 free, scientifically known as Paracheirodon innesi, a popular small tropical aquarium fish known for its bright blue and red coloration
- Peaceful Community Aquarium Fish: Neon Tetras are calm schooling fish that do well in community freshwater tanks with other peaceful species of similar size and temperament
- Suitable for Planted Tanks: Their small size and vivid color make them a beautiful choice for planted aquariums, nano tanks, and natural-style freshwater aquascapes
- Approximate Size 1 to 2 cm: Each Neon Tetra is approximately 1 to 2 cm in length, providing active and colorful movement to enhance the visual appeal of your aquarium
- Schooling Fish for Best Display: Neon Tetras thrive best in groups, creating a more natural swimming pattern and a brighter visual effect inside freshwater aquariums
Rank #3
- Pack of 6 Galaxy Rasboras – Add a beautiful group of Galaxy Rasboras, also known as Celestial Pearl Danios, to your freshwater aquarium for color, movement, and natural schooling behavior.
- Colorful Freshwater Aquarium Fish – Known for their spotted bodies, bright orange-red fins, and active swimming, Galaxy Rasboras bring a unique and eye-catching look to planted aquariums.
- Peaceful Community Fish – These small, calm fish are great for peaceful community tanks with other non-aggressive freshwater species of similar size.
- Perfect for Planted Tanks – Galaxy Rasboras look best in aquariums with live plants, driftwood, rocks, and open swimming areas where they can explore and display natural behavior.
- Carefully Packed for Live Delivery – Each order is prepared with care for safe live fish shipping. Slowly acclimate fish upon arrival before adding them to a fully cycled freshwater aquarium.
Introduce tank mates carefully
- Check the actual species’ requirements. Compare temperature, pH and relevant hardness, as well as adult size, temperament, social group and space needs.
- Check the aquarium before adding fish. PetMD lists a freshwater aquarium water test kit among guppy supplies and recommends monitoring water quality. Test the tank rather than assuming its conditions match a care-sheet range.
- Add fish gradually. PetMD advises gradual introductions rather than adding all new tank mates at once.
- Monitor the water after each addition. PetMD specifically advises checking ammonia, pH and nitrate after adding tank mates. If the fish show signs of stress or water quality changes, reassess the stocking and aquarium conditions before adding anything else.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
