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PisciDex Species Profile
Discus
Iconic warm-water cichlid that needs stable soft acidic conditions, clean water, and calm tankmates suited to high temperatures.
Symphysodon discus
Cichlidae | South America | Amazon basin blackwater habitats
Core Requirements
Tank Size
75 gallons minimum
Adult Size
8 inches
Group Size
Group 6+
Bioload
5/10
Water Parameters
Temperature
82-86 F
pH
4.5-6.5
Plant Safe
Yes
Invert Safe
No
Data Confidence
Unknown
Behavior & Husbandry
Temperament
Peaceful
Aggression
2/10
Diet
Omnivore
Difficulty
Advanced
Lifespan
10 years
Breeding
Advanced
Schooling
Yes
Compatibility Tags
Large TankPeacefulSchoolingMid WaterPlant SafeBlackwaterSoftwater
Species Compatibility
Database-driven compatibility notes for planning community aquariums.