Small (up to 150 liters):
6x Hermit Crab (Calcinus laevimanus or Clibanarius sp.)
6x Algae-Eating Snails (Nerita sp., Tectus sp. or other species)
6x Burrowing Sand Snails (Cerithium sp./Nassarius sp.)
Large (up to 250 liters):
10x Hermit Crab (Calcinus laevimanus or Clibanarius sp.)
10x Algae-Eating Snails (Nerita, Tectus, or other species sp.)
8x Burrowing Sand Snails (Cerithium, Nassarius sp.)
Extra Large (up to 500 liters):
25x Hermit Crab (Calcinus laevimanus or Clibanarius sp.)
15x Algae-Eating Snails (Nerita sp./Tectus sp. or other species)
10x Burrowing Sand Snails (Cerithium sp./Nassarius sp.)
1x Sea Urchin (various algae-eating species)
Algae Extreme:
1x Sea Hare (Dolabella auricularia)
1x Sea Urchin
10x Algae-Eating Snail (Nerita, Trochus, Astreas sp.)
Bristleworm Hunter:
1x Boxing Shrimp (Stenopus hispidus)
1x Seticornis (stenorhynchus seticornis)
Cyano & Sand:
10x Sand-burrowing Snail (Cerithium sp.)
1x Sand-Sifting Sea Star (Archaster angulatus or typicus)