Can white cloud minnows live with pencilfish?

Verdict
No

No. White cloud minnows and pencilfish should not share a tank. White cloud minnows are coldwater animals (60–72°F); pencilfish need 75–82°F. No temperature suits both.

White cloud minnowWhite cloud minnow60–72°F · pH 6–8 PencilfishPencilfish75–82°F · pH 5–7.5

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°White cloud minnow 60–72°Pencilfish 75–82°
The ranges do not meet, so one of them would always be too warm or too cold.
456789Both: 6–7.5White cloud minnow 6–8Pencilfish 5–7.5
The green band is the pH both tolerate.

Size to scale

White cloud minnow · 1.5 inPencilfish · 2 in0"1"2"3"4"5"6"
Adult length in an aquarium. A fish can swallow anything that fits in its mouth, roughly a third to half its own length for predators.

Care at a glance

White cloud minnowPencilfish
Temperature60–72 °F75–82 °F
pH6–85–7.5
Adult size1.5 in2.0 in
Minimum tank10 gal15 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for white cloud minnows

All white cloud minnow tank mates

Better tank mates for pencilfish

All pencilfish tank mates

Questions

Can white cloud minnows live with pencilfish?

No. White cloud minnows and pencilfish should not share a tank. White cloud minnows are coldwater animals (60–72°F); pencilfish need 75–82°F. No temperature suits both.

What temperature suits both white cloud minnows and pencilfish?

None. White cloud minnows need 60–72 °F and pencilfish need 75–82 °F, so the ranges do not meet.

What size tank do white cloud minnows and pencilfish need together?

At least 15 gal, set by the pencilfish. Add space for each extra fish.