Fish & Invertebrates
Cleanup Crew Selection: Snails, Crabs, and Shrimp for Every Tank Size
Exact CUC counts for 20, 40, 75, and 120-gallon reefs — trochus, nassarius, hermits, and shrimp ratios.
An effective cleanup crew is built around three categories: algae grazers, sand stirrers, and detritivores. Get the ratios right and the tank cleans itself.
For a 75-gallon reef
- 20 trochus snails (algae grazers)
- 10 nassarius snails (sand cleanup)
- 10 blue-leg hermits (detritus)
- 2 cleaner shrimp
- 1–2 emerald crabs
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