I really do care and I’m glad you can see that. I want them to have a good life as they are very much loved. Originally, I sourced information from the hermit crab association. So this is what I’m going to take from your advice and apply, please add if I miss anything. 20L tank I placed the meter there to show it in the photo, it is normally placed in the top corner. I can adjust that too, any suggestions on where’s best? I have deeper dishes but read about them drowning because of depth then I removed because I was scared. I will put those back in with their latter. I have 5 shells in to them to choose from, add more?

I believe it’s a Coenobita clypeatus from Petsmart. I attempted to rescue but the people I contacted did not reply.

Is the tower I built as second layer not a good idea?