Hi Patricia I agree with what Chris said about Planaria. I had a heavy infestation in one of my tanks and was able to eliminate it with Fluke Tabs which also work great on Hydra. It didn't bother the baby fish (Betta smaragdina) or the few plants I had in the tank. Tom Wojtech ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com.