I'm replacing my crabs substrate this weekend because I have mites. I'm an amateur crabber and need some help. I've been using EE and was wondering how you deal with crab poop if you can't see it? Since I can't tell it apart from the substrate, is it bad for it to be in there? Also, I'm thinking of using sand this time for this reason. Will it stress my crabs out if I suddenly go from EE to sand? They bury a lot and I only see them out for about an hour per day.