That works very well and is all natural. That's how I do it if I just have a few. Now I keep at least 3 peppermint shrimp in each tank and they eat them. I know people have mixed luck with peppermints but I think it has to do with the number of them kept as a ratio to gallons of water.I was actually able to get rid of them by injecting plain old lemon juice (about 1-2mL) into the hole where it was living. I also tried injecting it with a syringe filled with my liquid calcium dose for the week. There is no trace of them anymore! If you do use lemon juice don't inject too many at a time (about 5 per session) because the lemon juice might mess with pH.