Can Green Terror Live With Jack Dempsey?
Yes, green terrors and Jack Dempseys coexist well in 55 gallons or larger because both are similarly sized Central American cichlids with matching care requirements.
Why
- Green terrors grow to about 8 inches while Jack Dempseys reach 10-12 inches, so neither is small enough to become prey.
- Temperature overlap of 74-78°F suits both species without any heater tweaking.
- pH range of 6.5-8 works for both, covering moderately soft to alkaline water.
- Both species are moderately aggressive and can hold their own against each other.
- A 55-gallon tank gives each fish room to establish territory without constant confrontation.
What could go wrong
During breeding, both cichlids become highly territorial and may clash over spawning sites, requiring close monitoring and potential separation.
Gear for a shared tank
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 74-78°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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