I have had great success using NIX in eradicating mites and the last time I had mites was 5 years ago... I continue to use Nix once every two weeks, using it to spray down the cage then wiping it down. My formula was half bottle of Nix for 1 gallon of water and it worked great. When I had mites, I would use NIX daily, spraying on the snake, inside the cage, and outside the cage. I would continue this for two weeks then after two weeks, I would use NIX every other day for two more weeks along with spraying whole lot of Nix onto paper towel then lightly wipe the snake.then thats it... No more mites ever since.... I also found them to be effective with ticks too... Whenever I get farm-hatched babies with ticks, I would pull the ticks off that I can find, then spray them down and next day find whole lot more ticks that I missed on the paper towel crawling around. Whatever advice Corey gives, I would be more than happy to take it and try it. He knows more than I do when it comes to snakes, but just offering you my experience and what works for me. Yes NIX comes in one size....