Coral Red Pencilfish

Coral Red Pencilfish

Nannostomus mortenthaleri
⚠ Use Caution
Guppy

Guppy

Poecilia reticulata

Can Coral Red Pencilfish Live With Guppy?

Coral Red Pencilfish and Guppy CAN coexist, but with some risks. Careful setup and monitoring required.

Detailed Analysis

Temperature ✓ Compatible

Good temperature overlap at 75–82°F.

pH ⚠ Use Caution

Very narrow pH overlap (6.8–7.0). Hard to maintain precisely.

Size ✓ Compatible

Compatible sizes (1.2" and 2").

Temperament ✓ Compatible

Both fish have compatible temperaments.

Swim Level ✓ Compatible

Fish occupy different water levels (Coral Red Pencilfish: middle, Guppy: top), reducing conflict.

Important Notes

  • Coral Red Pencilfish is a schooling fish and needs at least 6 of its kind.
  • Guppy is a schooling fish and needs at least 3 of its kind.

Tank Requirements

Minimum tank size for this combination: 15 gallons

ParameterCoral Red PencilfishGuppy
Temperature75–82°F72–82°F
pH4.5–76.8–7.8
Max Size1.2"2"
TemperamentPeacefulPeaceful
Swim LevelMiddleTop
Min Tank10 gal10 gal

Check More Combinations

Use our compatibility checker to add more fish and plan your complete tank.