Today I woke up and inspected my tank and found 2 other fish dead. This has been going on for the last week. Every time I place new fish in the tank they are dying. The older ones seem to be just fine. At first I thought it was ich but I am not seeing any of the symptoms. There must be a bacteria or parasite floating around the tank. No I don't have any aggressive fish. There was no fighting or picking on each other. Being the fact I have a reef set up is there any medication anyone would suggest to get rid of the parasite/bacteria in my tank? I'm hearing prazipro, metro, herbtana. Suggestions would be great. All parameters are ok. Nitrate and ammonia are at 0