I HAD THE SAME PROBLEM WHEN I GOT MY TANK AND SET IT UP MY TANK WAS ONLY TAKEN DOWN 1HOUR BEFORE I RECEIVED IT AND I STILL HAD PROBS. I LET IT CLYCE 4 2WEEKS AND ADDED 2 DAMSELS 2WEEKS LATER I ADDED A TANG WITHIN 10DAYS MY TANG WAS DEAD AS WELL AS THE DAMSELS FROM ICK I TREATED MY TANK FOR ICK...