There a few things you can do. Emps have been known to submerge themselves for several minutes, but I wouldn't advise it. How do you think you got the mites in the tank? If they are little white mites, then the only problem is they are a nuisance and they can stress the emp out. I'm not sure that you can ever be rid of them, but I say place your emp in as small as a container that it can fit in, then spray it down with water and move it into the new enclosure. I hope this helps!!!