Have there been any discussions on this site regarding a reptile care product called Provent-a-Mite? (yes, that's how they spell it). I don't know if I'm allowed to post a link or not, so I won't. But their site says that the product is FDA and USDA approved, and is the only safe product you can apply to the inside walls & substrate of a reptile tank, and not have to rinse it off. They say the product will kill the mites in the tank, and also prevent them from coming back. Of course they state that it won't harm reptiles at all. If small reptiles aren't bothered by this product, I was wondering if anyone has tried it in their crab tank. I got rid of the mites in my tank months ago, but now they're back. Microscopic white dots are doing the backstroke in my crabbies' water dishes. I hate it!