I went to walmart and found this pest offense plug in, it works with the wiring in your house, one plug in works with one level, effects the nervous system of bugs and certain animals like the rodent family. says right on box safe for hermit crabs! we are having such an issue with ants and now spiders and they are white! I have never seen these white spiders before! I found a bunch of their eggs in the basement and sprayed the crap out of them and I hope I killed them off but I know there are more I can't see. Says may take 2 weeks to work. read a few reviews it says it works but there are some knock off brands that are crudsville.