Discus Fish Care Guide

Discus fish (Symphysodon spp.) are often called the “King of the Aquarium” thanks to their graceful shape, vibrant colors, and peaceful nature. They make a stunning centerpiece in any freshwater setup, but they do require special care to thrive.

✅ Tank Requirements

• Tank Size: Minimum 50–75 gallons for a small group. Larger tanks (100+ gallons) are ideal for long-term success.

• Schooling Fish: Discus are social and should be kept in groups of at least 5–6. Keeping them in smaller numbers can cause stress and bullying.

• Tank Shape: Taller tanks work well, since discus like mid-water swimming space.

️ Water Parameters

• Temperature: 82–86°F (28–30°C)

• pH: Slightly acidic to neutral (6.0–7.0)

• Hardness: Soft water preferred (1–8 dGH)

• Filtration: Strong, efficient filtration with gentle flow. Canister filters are highly recommended.

• Water Changes: Frequent water changes are essential – 25–50% 2–3 times per week for optimal health.

️ Diet & Feeding

Discus are omnivores with a preference for high-protein foods.

• Staple Foods: High-quality discus pellets or granules.

• Frozen Foods: Bloodworms, brine shrimp, beef heart mixes, mysis shrimp.

• Occasional Treats: Live foods for conditioning and stimulating natural feeding behavior.

• Feeding Frequency: 2–3 small meals per day; avoid overfeeding to prevent water quality issues.

Tank Setup & Décor

• Substrate: Fine sand or bare-bottom (easier for cleaning in discus-specific tanks).

• Plants: Live plants like Amazon swords, java fern, or driftwood add natural cover.

• Lighting: Moderate

• Aquascape: Open swimming areas are essential; décor should not overcrowd the tank.

Tank Mates

Choose peaceful, warm-water compatible species.

• Good Tank Mates: Cardinal tetras, rummy nose tetras, corydoras catfish (warm-tolerant varieties), German blue rams.

• Avoid: Fin nippers, aggressive cichlids, or overly active fish that outcompete discus for food.

❤️ General Care Tips

• Buy discus from reputable breeders to ensure healthy stock.

• Quarantine new fish before adding to the main tank.

• Stability is key – discus do not tolerate sudden changes in water quality, temperature, or pH.

• Be patient! Discus may take time to settle and show their full colors.

Summary

Discus fish are some of the most rewarding and beautiful freshwater fish, but they require stable water conditions, a proper diet, and group care to thrive. With dedication and the right setup, they can live up to 10 years and become the crown jewel of your aquarium.