Raising Marine Hermit Crabs

[Drake X. Bit]

How do you raise Marine Hermit Crabs. I'm thinking of doing a tank of just various species of Marine Hermit Crab (see thread here: https://www.reef2reef.com/threads/only-one-species-in-an-aquarium.290421/ ), and I've had a lot of experience raising Land Hermit Crabs. However, I understand that Marine crabs are more complicated. I know that they must be submerged at all times, and are pickier eaters. I've asked the Hermit Crab Association forums, but they have very little info on Marine Crabs, spare a bare-bones care sheet (http://www.hermitcrabassociation.com/phpBB/viewtopic.php?f=55&t=51386)