Three spot gourami care guide
Also called: Three-spot gourami, Blue gourami, Gold gourami, Opaline gourami, Platinum gourami, Lavender gourami, Cosby gourami
The three spot gourami is a hardy 4–5 in (10–12 cm) gourami sold as blue, gold, opaline and platinum forms. It is easy to keep in a 29 gallon (110 L) or larger tank, but males can turn territorial, so pick sturdy tank mates.
Three spot gouramis need a tank of at least 29 gallons (110 L), and water at 24–28°C (75–82°F) with a pH of 6–8. They grow to about 12 cm (4.7 in) and are semi-aggressive.
Plan a tank with three spot gouramisSee all tank mates
Three spot gourami quick facts
| Scientific name | Trichopodus trichopterus |
|---|---|
| Family | Osphronemidae |
| Origin | Mekong basin and nearby lowlands of Southeast Asia (gold, opaline and platinum forms are captive-bred) |
| Adult size | 12 cm (4.7 in) |
| Minimum tank | 29 gallons (110 L), at least 90 cm (35 in) long |
| Temperature | 24–28°C (75–82°F) |
| pH | 6–8 |
| Hardness (GH) | 5–19 dGH |
| Group size | Alone (only one male) |
| Temperament | Semi-aggressive; males fight each other |
| Swims at | Top |
| Diet | Omnivore |
| Care level | Easy |
| Lifespan | 4–6 years |
| Safe with shrimp? | No, eats shrimp |
| Safe with plants? | Yes |
- Long fins attract fin nippers.
Tank setup
Give one adult 29 gallons (110 L) or more, in a tank about 36 in (90 cm) long. Give it floating plants, tall stem plants and open swimming space in the middle. Keep the flow gentle, use smooth decor so the long feelers do not snag, and leave a gap under the lid for air.
How many three spot gouramis in a tank?
The smallest common tank that suits three spot gouramis is a 40 gallon. Here is roughly how many fit in each size when they are the only fish, based on adult size and waste output. Leave room if you want tank mates.
| Tank | Three spot gouramis (alone) |
|---|---|
| 3 gallon | Too small |
| 5 gallon | Too small |
| 10 gallon | Too small |
| 15 gallon | Too small |
| 20 gallon | Too small |
| 20 gallon long | Too small |
| 29 gallon | Too small |
| 40 gallon | Up to 8 |
| 55 gallon | Up to 11 |
| 75 gallon | Up to 15 |
| 125 gallon | Up to 25 |
Numbers are bioload limits only. Males fight, so keep one male unless the tank is large and well planned.
What you need for three spot gouramis
Sized for a 29 gallon tank, the smallest common size that suits three spot gouramis. For a different tank or a mix of fish, use the stocking calculator for a list sized to your plan.
Tank and equipment
- 29 gallon aquarium (tank or kit) (opens Amazon in a new tab)Bigger tanks are more stable and easier for beginners. How to choose
- Aquarium stand for 29 gallons (opens Amazon in a new tab)The water alone weighs about 242 lb (110 kg), before glass, gravel and rock. How to choose
- Adjustable heater, 150 W (opens Amazon in a new tab)Holds about 79 °F (26 °C) in a room at 65 °F (18 °C). How to choose
- Aquarium thermometer (opens Amazon in a new tab)Check it daily: heaters can fail stuck on or off. How to choose
- Hang-on-back filter rated 115–175 GPH (opens Amazon in a new tab)Community tank: 4–6 times the tank volume per hour. How to choose
- About 45 lb of aquarium gravel (opens Amazon in a new tab)Enough for a layer about 2 in (5 cm) deep. Smooth gravel suits most community fish. How to choose
- Water conditioner (dechlorinator) (opens Amazon in a new tab)Removes chlorine and chloramine from tap water. Seachem Prime is a popular, concentrated choice. How to choose
- Liquid test kit (ammonia, nitrite, nitrate, pH) (opens Amazon in a new tab)Liquid kits are more accurate than strips. The API Freshwater Master Test Kit is the common choice. How to choose
- Gravel vacuum (siphon) (opens Amazon in a new tab)Cleans the gravel and does the water change in one go. How to choose
- LED aquarium light, about 30 in long (opens Amazon in a new tab)Match the light to the tank length. Basic LEDs grow easy plants. How to choose
Food and extras for three spot gouramis
- Tropical fish pellets (opens Amazon in a new tab)A good staple for medium community fish.
- Caves and hides (opens Amazon in a new tab)Gives shy and territorial fish their own space.
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Water parameters
Keep it at 24–28 °C (75–82 °F), pH 6.0–8.0 and about 5–19 dGH. This is one of the hardiest gouramis and adapts to most tap water. Change 25–30% of the water every week and keep the tank out of direct sun.
Best tank mates for three spot gouramis
These popular species share three spot gouramis' water needs and temperament. See the full list of 40 good matches.
Nerite snail
2.5 cm (1 in) · 22–27°C (72–81°F)
Bristlenose pleco
12 cm (4.7 in) · 22–26°C (72–79°F)
Bronze corydoras
7 cm (2.8 in) · 21–26°C (70–79°F)
Assassin snail
2.5 cm (1 in) · 22–27°C (72–81°F)
Ramshorn snail
2 cm (0.8 in) · 21–27°C (70–81°F)
Malaysian trumpet snail
2.5 cm (1 in) · 20–27°C (68–81°F)
Mystery snail
5 cm (2 in) · 21–26°C (70–79°F)
Platy
6 cm (2.4 in) · 20–26°C (68–79°F)
Avoid keeping three spot gouramis with
- Betta fish: Betta fish tends to attack colourful, long-finned fish like three spot gouramis, mistaking them for rivals.
- Cherry shrimp: Three spot gourami eats small shrimp like cherry shrimp.
- Common goldfish: They need different temperatures: Three spot gourami 24–28°C (75–82°F), common goldfish 15–22°C (59–72°F).
- Fancy goldfish: They need different temperatures: Three spot gourami 24–28°C (75–82°F), fancy goldfish 18–23°C (64–73°F).
- Tiger barb: Tiger barb is a well-known fin nipper and will shred the long fins of three spot gouramis.
- Dojo loach: They need different temperatures: Three spot gourami 24–28°C (75–82°F), dojo loach 18–23°C (64–73°F).
Feeding
It is an easy omnivore. Build the diet on flakes or small pellets, with frozen bloodworm, brine shrimp or daphnia two or three times a week. Spirulina flake or blanched zucchini adds greens, and it also grazes algae.
Behavior
Temperament varies a lot. Many stay calm, but some males become bullies as they mature, especially toward other gouramis and bettas. Males fight each other, so keep one per tank unless it is large and well planted. It may nip slow, long-finned fish. Good mates are sturdy fish of a similar size, such as black skirt tetras, black ruby barbs, yoyo or zebra loaches, bristlenose plecos and medium catfish.
Breeding
Males grow a little larger and have a long, pointed dorsal fin; females have a shorter, rounded dorsal fin and a fuller belly. The male builds a bubble nest among floating plants and can be rough with the female, so give her plenty of cover. In a separate tank, remove the female after spawning and the male once the fry swim, about 4–5 days later. Feed infusoria first, then baby brine shrimp.
Tips from experienced keepers
- Blue, gold, opaline, platinum and lavender gouramis are all this one species, so their care and temper are the same.
- Watch a new gourami closely for the first weeks, and have a plan to rehome it if it starts bullying.
- Floating plants and sight breaks give other fish a way to escape a pushy male.
- Do not keep it with dwarf shrimp; it hunts them.
Frequently asked questions
Are blue gouramis aggressive?
They are semi-aggressive. Many live peacefully in a community, but some males become territorial with age and bully smaller or similar-looking fish, especially other gouramis.
What size tank does a three spot gourami need?
At least 29 gallons (110 L) for one adult, in a tank about 36 in (90 cm) long. More than one gourami, or a busy community, needs a bigger tank.
Can three spot gouramis live with bettas?
It is not recommended. Both are territorial labyrinth fish that use the surface, and the larger gourami can harass or injure a betta.
Sources
We checked these references when writing this page. Values are for healthy long-term keeping, not survival limits. Last reviewed 2026-10-13. See our editorial policy.