Yeah I I was wondering about that one so it’s good to hear that someone had success with it. If I run that through the tank is to have all the rock and separate containers, and then just the sand in the tank so I can sift through it.Ive had them and sold them and never had an issue with them going after other inverts. Using Prazipro which is tank safe will also kill them but you then have to vacuum and search for and remove the dead ones