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