Betta (Betta splendens) is a beginner-level freshwater fish that needs at least 5 gallons and 76-82°F. A bold, long-finned labyrinth fish that breathes air at the surface. Males cannot share a tank with one another. Needs a heated, filtered tank, not a bowl.
Care facts at a glance
| Scientific name | Betta splendens |
|---|---|
| Family | Osphronemidae |
| Origin | Thailand and Southeast Asia |
| Adult size | 2.5-3 in |
| Minimum tank | 5 gallons |
| Temperature | 76-82°F |
| pH | 6.5-7.5 |
| Temperament | Aggressive toward other bettas |
| Social behavior | Solitary |
| Swim level | Top |
| Difficulty | Beginner |
| Diet | Carnivore: betta pellets, frozen foods |
| Typical lifespan | 3-5 years |
Quick tips
- Heater and gentle filter, not a bowl.
- Never house two males together.
- Avoid fin-nipping tankmates.
San Diego water
Captive-bred stock usually adapts to San Diego tap water with slow acclimation. For best color and health, many keepers blend tap with RO/DI water. Learn the numbers in our San Diego tap water guide.
Before you buy
Make sure your tank is cycled (how to cycle a tank), check your numbers with the water testing guide, and use the compatibility guide to check tankmates. These are general ranges; individual fish and local water vary.
Find it at Pet Zone
Pet Zone Tropical Fish is a San Diego aquarium store with two locations. Stock changes daily, so call ahead if you are after a specific species or plant. Shop online at petzonesd.com.
4160 Convoy St, San Diego, CA 92111
(858) 987-0309
Open daily, 10am-6pm
Aquascaping, planted tanks
4266 University Ave, San Diego, CA 92105
(619) 283-1812
Closed Monday; Tue-Fri 10:30am-6pm, Sat 11am-6pm, Sun 11am-4pm
Monster fish, koi