get some joe's juice and kill them all now. if you wait, you will regret it. they long you wait, the worse it gets. go get some joes juice, and it will take care of it. it only costs about $10, and you just squirt them with it. Kill everyone that you see, and eventually you wont see them at all anymore....i got peppermint shrimp too, but joe's juice is what got it done for me.