It depends on the hermit crab but I would personally say just to be careful No the big one might hurt or bully the smaller crab.
get a large cup and put the shell or the toy inside. Then get a pan and boil the water inside it. put the water in the cup and wait 2 minutes then take the shells out of the cup and put them in the hermit crab cage.
it depends how big the hermit crab is or the fish bowl
if your hermit crab pinches you put it under cold water
Well if you have a friend who lives close and has hermit crabs then when you are hanging out at each others houses you could bring your hermit crab with you and put it in their tank. (You need a little moving tank. The very small ones with a little handle on the top.) But when you leave you need to bring your hermit crab with you. ~EEE2
no we had over ten hermit crabs in one cage and they were all fine.:) since they are both different sizes you should keep an eye on them but you shouldn't worry because hermit crabs are very social animals.
(This works for MY hermit crab) Put a small spoon of peanut butter on a flat sea shell and they go nuts! they LOVE playing in it.
yes
down the toiliot
You should let it mold. It is part of life for a Hermit crab.
Molch, small water bowl empty shells and logs and small caves. put them with 4-5 different crabs
Yes, hermit crabs don't usually fight. You could give the new hermit crab a bath so that it smells the same as the other hermit crab in you tank.
If you mean will it kill the crab, no. However the hermit crab probably won't be able to use most toys. Depending on what it is.