Discus — Fish Profile
Symphysodon aequifasciatus
Quick Specs
| Adult Size: | 8.0" |
| Temperament: | peaceful |
| Care Level: | expert |
| Min Tank Size: | 55 gallons |
| Temperature: | 82-86°F |
| pH Range: | 6.0-7.0 |
| Diet: | carnivore |
| Origin: | South America (Amazon Basin) |
| Lifespan: | 10+ years |
Overview
Discus are the 'king of aquariums' requiring pristine water conditions and higher temperatures. They thrive in schools of 5+.
Care Guide for Discus
Tank Setup
Discus requires a minimum tank size of 55 gallons. Maintain water temperature between 82°F and 86°F, with a pH range of 6.0 to 7.0. A properly sized tank with adequate filtration and regular water changes is essential for long-term health. When housing Discus with other species, always choose a tank size that accommodates the most demanding fish in the community.
Feeding
Discus is a carnivore feeder. Provide a varied diet appropriate for carnivore species to ensure optimal health and coloration. Feed small portions 2–3 times daily, and remove uneaten food after a few minutes to maintain water quality.
Temperament & Compatibility
This species is classified as peaceful. Discus reaches an adult size of 8.0 inches and has a care level of expert. Always research compatibility before adding new fish to an established aquarium. Individual temperament can vary, so monitor new introductions closely for the first 48 hours.
Origin & Lifespan
Discus originates from South America (Amazon Basin) and has an expected lifespan of 10+ years when kept in proper water conditions with appropriate tank mates and diet.
Compatible Tank Mates
🟢 Good Tank Mates
🟡 Caution Tank Mates
Compatibility Results for Discus
All 69 compatibility checks involving Discus:
Recommended for Discus
Oase BioMaster Thermo Filter — $299.99Premium canister filter for discus tanks
Expert Care Tips for Discus
- Large tank required: At 55+ gallons, Discus needs serious equipment investment. Ensure your filter is rated for at least 1.5× the tank volume.
- Warm-water species: Discus prefers 82–86°F. Use a reliable submersible heater with a thermostat — avoid temperature swings above 2°F per day.
- Narrow pH tolerance: Discus only tolerates pH 6.0–7.0. Test your tap water before buying — adjusting pH is harder than choosing the right fish for your water.
- Peaceful community fish: Discus works well in community tanks. Still, avoid housing with fish large enough to eat them — a 8.0" fish is vulnerable to anything with a mouth bigger than 2×.
- Acclimation: Always drip-acclimate Discus over 30–45 minutes. Match temperature and pH gradually to prevent osmotic shock.