Discus Care Guide: Keeping the King of the Freshwater Aquarium

Discus fish are widely regarded as the most beautiful freshwater fish in the world — and the most demanding. Their stunning disc-shaped bodies, intricate color patterns, and regal presence make them the crown jewel of the planted aquarium hobby. While they require more care than most freshwater fish, the reward is an aquarium of breathtaking beauty. Here's your complete guide!

⚠️ Are Discus Right for You?

Discus are not beginner fish. They require:

• Pristine water quality with very low nitrates (below 10 ppm)
• Warm temperatures (82–86°F) — higher than most tropical fish
• Soft, slightly acidic water (pH 6.0–7.0; TDS 100–200 ppm)
• Frequent water changes (30–50% every 1–2 days for optimal health)
• High-quality, varied diet fed 3–5 times daily

🏠 Tank Setup

• Tank size: Minimum 55 gallons tall (discus are tall fish); 75–100 gallons for a group of 6+
• Temperature: 82–86°F — use a reliable heater and thermometer
• Filtration: Powerful canister filter with gentle flow — discus dislike strong currents
• Water: RO (reverse osmosis) water remineralized to TDS 100–200 ppm is ideal
• Plants: Amazon swords, vallisneria, and java fern thrive at discus temperatures
• Substrate: Fine sand or bare bottom (easier to keep clean)
• Lighting: Moderate — discus prefer subdued lighting

🍽️ Feeding

Discus have high protein requirements and must be fed frequently:

• Staple: High-quality discus pellets and beef heart mix
• Frozen foods: Bloodworms, blackworms, and brine shrimp
• Feed 3–5 small meals daily — discus have small stomachs and fast metabolisms
• Remove uneaten food immediately — water quality is paramount
• Fast one day per week to prevent digestive issues

🐠 Popular Discus Varieties

• Wild types: Heckel discus, green discus, and brown discus
• Domestic strains: Red melon, blue diamond, pigeon blood, checkerboard, and leopard snakeskin
• Keep discus in groups of 6+ — they are social fish that stress when kept alone

💧 Water Quality & Maintenance

• Perform 30–50% water changes every 1–2 days
• Test water daily: ammonia, nitrite, nitrate, pH, and TDS
• Keep nitrates below 10 ppm — discus are extremely sensitive to nitrate
• Match new water temperature exactly before adding to tank

💊 Health & Common Issues

Common discus health issues include hole-in-the-head disease (from poor water quality or nutritional deficiency), internal parasites (hexamita), and bacterial infections. Quarantine all new fish for 4–6 weeks. A discus-experienced veterinarian should be consulted for any health concerns.

Explore our Discus Collection for all the premium supplies the king of the freshwater aquarium needs to thrive! 🐟