I was going to try putting some snails or a Hermit crab in my FOWLR tank. The tank consist of a Picasso Trigger, Blue Throat Trigger, Stars and Strip Puffer, Emperator Angel, Yellow Tang, Harlequin Tusk, and a Fire Shrimp. Are these fish just going to make a meal out of the Snails or Crab or do they have a chance at surviving?

For snails, I would get larger Turbo snails.

