Hermit crabs will kill and eat snails when they get hungry, so it is not wise to house both in the same tank. Margarita Snails are temperate, so they do not tolerate tropical temperatures for very long as it increases their metabolism. The increased metabolism makes them very good algae eaters, but most do not last a year. I have always despised J&L's CUC packages - they are ridiculous.
To give you an idea, here is what I have in my tanks...
90-gallon: 5 Astraea Snails, 2 Ring Cowries, 1 Fighting Conch, 1 Black Brittle Starfish, 4 female Emerald Crabs, 2 Peppermint Shrimp, 1 Pin Cushion Urchin.
50-gallon: 2 Astraea Snails, 1 Fighting Conch, 1 female Emerald Crab, 2 Peppermint Shrimp, 1 Tuxedo Urchin.
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~ Mindy
SPS fanatic.
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