I am new to saltwater (29 gallon with live rock and live sand) Protein Skimmer and circulator. After one month, I added 4 scarlet hermit crabs, turbo snail, Astral snail, 1 nassarius snail and peppermint shrimp. The following week I added 3 blue hermit crabs, 3 margarita snails, 2 cerith an...