Can Jack Dempsey Live With Neon Tetra?
No, adult Jack Dempseys are large, aggressive cichlids that readily eat neon tetras in any tank size.
Why
- Jack Dempseys grow to 8-12 inches. Neon tetras stay at 1.5 inches and are easy prey for a fish of that size.
- Jack Dempseys are cichlids known for high aggression and territorial behavior, especially as adults.
- Water parameters overlap (72-81F, pH 6.5-7.0), which makes the pairing look viable on paper.
- Even a Jack Dempsey that is not actively hunting will stress tetras through sheer presence and territory size.
- Surviving tetras will be skittish, pale, and prone to illness from chronic stress.
What could go wrong
Tetra numbers drop one at a time over weeks as the Jack Dempsey learns to hunt them, often overnight.
If you keep them in separate tanks
Sized for the 55 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 55 gallon minimum.
Eheim Jager 300W Thermostat Heater
Holds a steady temperature inside the 72-81°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
Jack Dempseys do well with other large cichlids or catfish. Neon tetras do well with corydoras, rasboras, or other small peaceful fish.
Related compatibility questions
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