Can Blue Emperor Tetra Live With Guppy?
Yes, blue emperor tetras and guppies share a tank well in 20 gallons or larger, and both species are active community fish that coexist without aggression.
Why
- Blue emperor tetras reach 1.5-2 inches. Guppies are 1.5-2.5 inches. Size overlap is close enough that neither can swallow the other.
- Both species prefer the middle water column but guppies move faster and occupy more levels. Blue emperors form tight schools while guppies scatter.
- Temperature range 73-81F covers both comfortably. Blue emperors tolerate the low end; guppies tolerate the high end.
- pH 7.0-7.5 suits the alkaline preference of livebearers and the tolerance range of blue emperor tetras.
- A 20-gallon tank supports a school of 6 blue emperors and a small guppy colony without parameter strain.
What could go wrong
Male guppies with heavy fins may attract curiosity from a large school of blue emperors, but nipping is uncommon with this species.
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 73-81°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.
Related compatibility questions
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