Let's say you are setting up a 55 gallon reef tank. The recipe calls for:
110 pounds of live rock: $550.00
55 pounds of live sand: $110.00
55 blue leg hermits: $82.50
28 Astrea snails: $42.00
2 serpent stars: $19.90
2 tiger tail cucumbers: $19.90
2 Peppermint shrimp: $19.90
8 Shipping Boxes: $64.00
That is from the TBS homepage.
For a 30g tank they would send me 30 hermit crabs
WAY too many critters.