Ok, so here's the problem. I just purchased 2 peppermint shrimp from petco because they are the only place near me that has them and I need them for apstasia. The tank next to their tank that runs on the same filter system had a fish with a bad case of ich. Can I freshwater dip the shrimp before putting them in my tank to avoid possibly introducing ich to my system? Also, do those things really control aipstasia, cuz I got a bad case of them. Thanks