What Preservatives Are Bad For Hermit Crabs. Do hermit crabs need water to swim in? Make sure that the water you give to your pet hermit crabs is free from chlorine.

These hermit crabs will typically have been forced into painted shells. Potatoes (make sure there’s no greens or eyes) parsley. The crabs like it and it doesn't have anything weird in it, it's just freeze dried spirulina and brine shrimp with some added vitamins.