We got 2 new snakes last weekend at an expo. One has been soaking all week. We were suspecting maybe mites but we didn't see anything on him or in his water. Last night we stuck him in a box for feeding and we saw a little black bug in it after we removed him. We are assuming this is a mite and we found some stuff online to put on the snake and we know we have to change out the susstrate. What else should I do to make sure they are gone for good??? We have 2 other snakes nearby and cats and dogs and I don't want any of the others to be affected. Please help!!!!