Can Oscar Live With Swordtail?
Maybe, with caveats , oscars and swordtails share temperature and pH ranges, but oscars are large cichlids that will view anything small as food.
Why
- Oscars grow to 12-14 inches and need 75+ gallons as single fish, so a 75-gallon minimum is the bare floor for one oscar.
- Temperature overlap of 74-81°F works for both species, with oscars preferring the warmer end.
- pH overlap of 7.0-8.0 suits both oscars and swordtails without stress.
- Oscars are predatory cichlids that eat fish whole , swordtails at 4-5 inches are borderline edible.
- Swordtails are active swimmers in the middle water column, which keeps them visible and tempting to an oscar.
What could go wrong
An oscar will eventually eat any fish small enough to fit in its mouth, and swordtails fall into that category even as adults.
Gear for a shared tank
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.
Eheim Jager 300W Thermostat Heater
Holds a steady temperature inside the 74-81°F window both species need.
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
Oscars do well with other large cichlids of similar size like jaguar cichlids or green terrors. Swordtails do well with platies, mollies, or other peaceful livebearers.
Related compatibility questions
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