Can Discus Live With Oscar?
No, discus need 82-88F while oscars need 74-81F, and oscars may eat or intimidate slow discus.
Why
- Discus require 82-88F. Oscars thrive in 74-81F. The overlap window is too narrow.
- Oscars grow to 12-14 inches and are aggressive cichlids that dominate tanks.
- Discus are slow, round-bodied fish that cannot defend themselves against oscars.
- pH overlaps at 6.0-7.0, but temperature and size difference make this pairing unworkable.
What could go wrong
Oscars may chase and nip discus, or simply intimidate them until the discus stop eating and die. Either way, the discus lose.
If you keep them in separate tanks
Sized for the 75 gallon minimum this pairing needs. Affiliate links — we earn a small commission if you buy through them.
Fluval 307 Performance Canister Filter
Oversized filtration is what lets you stock two species together without water quality crashing. Rated for a tank slightly larger than the 75 gallon minimum.
API Freshwater Master Test Kit
Keep ammonia, nitrite, and nitrate in check. Two-species tanks have more bioload and less margin for error than single-species setups.
Better pairings to consider
Discus do well with rams, keyhole cichlids, or small tetras in a species tank. Oscars do well with other large cichlids, large plecos, or severe weather loaches.
Related compatibility questions
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