Can pictus catfish live with siamese algae eaters?

Verdict
Yes

Yes, pictus catfish and siamese algae eaters can live together. Both are fine at 75–79°F. Plan on at least 55 gal.

Pictus catfishPictus catfish72–79°F · pH 6–7.5 Siamese algae eaterSiamese algae eater75–79°F · pH 6.5–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–79°Pictus catfish 72–79°Siamese algae eater 75–79°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Pictus catfish 6–7.5Siamese algae eater 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Pictus catfish · 5 inSiamese algae eater · 6 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

Pictus catfishSiamese algae eater
Temperature72–79 °F75–79 °F
pH6–7.56.5–7.5
Adult size5.0 in6.0 in
Minimum tank55 gal30 gal
TemperamentSemi-aggressivePeaceful
Swims atBottomBottom
GroupGroups of 3+Alone or in pairs
DietCarnivoreHerbivore

Better tank mates for pictus catfish

All pictus catfish tank mates

Better tank mates for siamese algae eaters

All siamese algae eater tank mates

Questions

Can pictus catfish live with siamese algae eaters?

Yes, pictus catfish and siamese algae eaters can live together. Both are fine at 75–79°F. Plan on at least 55 gal.

What temperature suits both pictus catfish and siamese algae eaters?

75–79 °F. Pictus catfish need 72–79 °F, siamese algae eaters need 75–79 °F.

What size tank do pictus catfish and siamese algae eaters need together?

At least 55 gal, set by the pictus catfish. Add space for each extra fish.