I just lost 4,hermies this winter sadly & I've been crabbing for 2,years now. I used to have 2,tanks (One for the tiny crabs & a bigger one for the larger crabs) Well my brother bought me a brand new 20,gallon long. I then decided to put all of my hermits in one tank instead of having to have to water & feed 2,tanks when all of them could fit in one. Ever since then the little ones have been attacked.
Or they died because,of shell fights.
I have a large variety of shells in my tank. Different size,shape,&&& types. I don't get it?!!? Sorry for blabing guys.