My fancy-tailed guppys tail is almost down to a stub. I used fluke tabs etc.. Now I just put in human tetracycline 50 mg. into water. My question is: How often do I dose and how much? Is 50 mg. ok? I thought human tetracycline would be more potent as compared to local pet store. He's extremely unusual in color! Do not want to loose this one. Can anyone advise? He is in hospital tank. Temperature: 80 or slightly higher. What are my options? Which meds. could and should I try? I am also salt dipping...Email or respond at this site. Email: FatAndUgli@aol.com