Can Platy Live With Swordtail?
Yes, platies and swordtails share a 20-gallon tank well, with overlapping hard water preferences and compatible temperaments.
Why
- Both species thrive in hard, alkaline water from pH 7.0-8.2 and temperatures of 72-80°F, giving them a wide comfortable overlap.
- Swordtails reach 5-6 inches while platies stay at 2.5 inches, a size gap that means the platy is at minimal risk in a well-stocked tank.
- Both are top-level swimmers and livebearers, which means they occupy similar tank zones but are not direct competitors.
- Both species eat similar foods, simplifying feeding in a shared tank.
What could go wrong
Both species breed readily and may hybridize, producing crossbred fry that complicate any effort to control the population.
Gear for a shared tank
Sized for the 20 gallon minimum this pairing needs. Affiliate links — we earn a small commission if you buy through them.
AquaClear 30 Power Filter
Oversized filtration is what lets you stock two species together without water quality crashing. Rated for a tank slightly larger than the 20 gallon minimum.
Eheim Jager 150W Thermostat Heater
Holds a steady temperature inside the 72-80°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.
Related compatibility questions
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