Discus (Symphysodon aequifasciatus) is a advanced-level freshwater fish that needs at least 75 gallons and 82-86°F. The 'king of the aquarium': a disc-shaped, warm-water cichlid that demands pristine water, high temperatures and frequent water changes. See our Discus Guides site for in-depth care.
Care facts at a glance
| Scientific name | Symphysodon aequifasciatus |
|---|---|
| Family | Cichlidae |
| Origin | Amazon basin, South America |
| Adult size | 6-8 in |
| Minimum tank | 75 gallons |
| Temperature | 82-86°F |
| pH | 6.0-7.0 |
| Temperament | Peaceful but shy |
| Social behavior | Groups, keep 5+ |
| Swim level | Mid |
| Difficulty | Advanced |
| Diet | Discus pellets, frozen and live foods |
| Typical lifespan | 10-15 years |
Quick tips
- Needs very warm, very clean water.
- Large, frequent water changes.
- Feed several small meals, not one big one.
San Diego water
Prefers softer, more acidic water than San Diego's tap (pH roughly 7.6-8.6, hard). Most keepers blend tap with RO/DI water or use a remineralized RO/DI supply. 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