Hard lesson to learn. I was double dosing prazi with no improvement. This was my hail mary. All my fish get 30 days of hypo, 30 days of cupramine, 3 rounds of prazi, 5 days of fenbendazole, 2 rounds of levamisole, and 7 days of rally pro now.Yeah, that was the only way that I cleared the tank, but not until I lost a few of my prize fish, Coradion, C. semilarvatus and a few others.