Still nothing, huh? I never used melafix in conjunction with the prazi meds. I used parasite clear, then prazi pro. When the tank was cleared with carbon, I added some melafix. Dude, sorry wish I could help. I had to put my one geo down he went thru the same thing. Floating around the tank aimlessly upside down, sideways, tail-down. Just floating around. I eventually had to do the same. NO OTHER FISH SUFFERED the same thing. It was really odd. In fact my other geo's are still perfectly healthy. This happened 3 mos ago.