You MUST treat IPs internally. FW fish do not drink water. I soak either bloodworms or crushed snail in the meds, then feed directly to fish with forceps. I add a drop or two Prazi to about a tablespoon of water and let it soak for 10-15min or so. They should eat it as long as the med taste isn't too strong. Adding garlic to the mix will enhance flavor & appetite.