HCA: Hermit Crab Association

I just moved into a mobile home and it's starting to get cold and I can hear mice trying to get in from underneath.They have not succeeded yet and I will make sure they don't. Traps inside are not an option because they are not in yet.I am going to go out and buy a few ultrasonic pest repellers to make sure that it is not an environment they want to come into.
Does anyone know if it will hurt my 3 hermies? I don't want to affect them or change the life they have been living for 3 years at my other place, just trying to keep the mice away. At least I hope it is mice and not a Poltergeist..

I don't know the answer. I wish I could help. I shall be curious to find out what others have to say though.

I have them in my house and I havnt seen any negative effects on my guys.

I had one n it had a pet safe option on it. If the pet safe was on no one seemed to be bothered but if t was off oh did it drive them a bit nuts. Idk if it is all of them or just this brand but like I said if the pet safe was on no one cared n it had no effects on anyone. If it was off even I heard it n omgosh was it annoying lol. I think though it is a trial and error. We got ours not just to keep mice away but the spiders too cause lately they are bad here ><.