CUC

What does CUC mean?

CUC (Cleanup Crew) refers to the assemblage of snails, hermit crabs, sand-sifters, and detritivores that consume detritus, uneaten food, and algae in a marine tank.

How is CUC used in aquariums?

Standard 50-gallon CUC: 25-30 snails (mix of turbo, trochus, cerith, nassarius), 5-10 hermits (blue-leg or scarlet), 1-2 cleaner shrimp, 1 sand-sifting starfish or fighting conch. Browse marine inverts for full CUC species library.

How CUC fits the bigger picture

Understanding CUC matters because it's connected to broader husbandry decisions: aquascaping decisions are hard to undo - plan rockwork + sand bed + flow paths before adding livestock.

Browse the Fast Aquatics care library for full husbandry tutorials covering CUC in context.

Frequently asked questions

What does CUC mean in fishkeeping?

CUC (Cleanup Crew) refers to the assemblage of snails, hermit crabs, sand-sifters, and detritivores that consume detritus, uneaten food, and algae in a marine tank. Standard 50-gallon CUC: 25-30 snails (mix of turbo, trochus, cerith, nassarius), 5-10 hermits (blue-leg or scarlet), 1-2 cleaner shrimp, 1 sand-sifting starfish or fighting conch. Browse marine inverts for full CUC species library.