When I got Blinky, I was surprised to open the box and see 3 bags. One contained large fiddler like crabs, one contained about 50 or so snails, and one contained Blinky. I originally put all of the snails, crabs, and Blinky together in the main tank. However, the crabs are starting to worry me. They have already killed all of the hermits I had for Blinky, and they seem aggressive. Blinky's mantle is about 1", and the crabs range in size from 1" -2" total length. I was wondering if I could keep all (about 10) of the crabs in a small sterilite container? It is flatter than it is tall, and probably holds about 1 gallon of water. Would I need any filtration? They seem to need air, because they are constantly cimbing the seals at the corners of the tank. They are dark blue, with reddish orange markings/claws. I know a lot of people don't have filtration on their feeder tanks when there aren't that many prey items in them. I'm gonna put a new filter pad in there for them to climb onto if they do indeed need air. Will blinky eat the small, round black snails? They are about 1/2". Thanks!