What can you use as a lid for your hermit crab?

Answer 1

in a ten or five gallon tank, you can use one of the lids especially made for those tanks. Those are the only cages hermit crabs can live in, so if you don't have a glass 10 gallon tank, get one! Make sure the lid has airholes

Answer 2

It most definitely does, because...

Hermit crabs need their atmosphere to be humid, because they find it hard to breathe if the air is too dry, so in order to keep them healthy, every day you must spray (or use some other technique) to keep their air moist, and use the lid to retain the humidity. Also, hermit crabs need a warm environment, and by using a lid not only can you retain moisture, but also heat.

The lid does not have to be much, as long as it's solid enough to fit the above requirements. Our lid, for example, is just a hardcover book and a piece of cardboard, but it does it's job.

=)