What shells can I add for my growing Hermits?

[Tdanza]

Hi,
I have Scarlets, Margaritas and dwarf red tip hermits in my tank and would like to add more shells for them to move into. I'm looking on ebay at assorted shells but was wondering if I have to buy a certain type. Will my hermits like any type of shell? Anyone with experience with this ?

thx
travis

 

[saltyfilmfolks]

ime best to look for shells in a similar shape to the ones theyre in. its still hit and but it been the best ive done