i just got rid of mites on 1 of my snakes in same room on top of multiple tanks didn't spread at all and only took 7 days didn't see any after day 3, i took out everything and soaked it in boiling water for a couple hours then put it out side after that i put the snake in a 50l tub with some water to soak and steamed out the enclosure from top to bottom and the out side too then vacuumed out and then ran the snake under running water, dried off and put back in the enclosure with nothing but the water bowl did this 2 times a day for the first 3 days morning then night and for the last 4 days i did it 1ce a day haven't seen any since. i was also steaming the other tanks on the outside every day and around the floor a little. that's how i did it chem free and happy with the results.