Will angelfish eat congo tetras?

No. Congo tetras reach 3 inches, which is too large for a 6-inch angelfish to consider prey. The size difference is enough that angelfish ignore them in favor of their own activities.

How many congo tetras should I keep with angelfish?

Get at least 6 congo tetras for a proper school. A group of 6-8 congo tetras plus 1-2 angelfish works well in a 40-55 gallon tank. More congo tetras means brighter coloration and more confident schooling behavior.

What temperature works for this combination?

Set the tank to 78-80F. This sits in the middle of the 76-82F overlap, keeping angelfish in good health while giving congo tetras their preferred warmth. Both species handle this range without stress.

Can congo tetras handle angelfish aggression?

Yes. Congo tetras are large enough and fast enough to hold their own. They school in the open and angelfish generally leave them alone unless a spawning pair claims territory near the congo tetras' swimming zone.

Can Angelfish Live With Congo Tetra?

By Alex WalshLast reviewed Apr 18, 2026

Yes

Yes, angelfish and congo tetras coexist in a 30-gallon tank, with both species swimming the middle column at temperatures from 76-82F.

Why

Angelfish at 6 inches and congo tetras at 3 inches have a significant size gap, but congo tetras are too large for angelfish to view as prey.
Both species prefer the middle water column and will move through the tank together without territorial conflict.
Temperature overlap spans 76-82F, giving flexibility to set the tank at 78-80F where both thrive.
pH overlap runs from 6.0-7.5, covering the preferred range for both species comfortably.
Congo tetras are peaceful schooling fish that ignore angelfish and focus on their own school behavior.

Minimum shared tank

30 gallons

Shared temperature range

76-82°F

What could go wrong

Male congo tetras with flowing fins may attract attention from angelfish during feeding time, so monitor the first few introductions closely.

Gear for a shared tank

Sized for the 30 gallon minimum this pairing needs. Affiliate links — we earn a small commission if you buy through them.

AquaClear 70 Power Filter

Oversized filtration is what lets you stock two species together without water quality crashing. Rated for a tank slightly larger than the 30 gallon minimum.

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Eheim Jager 200W Thermostat Heater

Holds a steady temperature inside the 76-82°F window both species need.

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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.

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