last year my bait held well till the end of the season, then i think i picked up a bait disease. I didn't buy bait till the end of the season when i wanted some larger bait. After several weekend of bait at a particular shop my bait started to get white fuzzy spots and dying. This past week my tank wen all to hell, the water had a light greenish tinge to it(which i thought was a good thing) last weekend. I didn't check it till Friday, i couldn't see the bottom and had numerous dead bait. Are you using anything for tank additives. Ive heard salt to toughen bait up, but ha vent tried. I also have a few crayfish in the tank, not sure if they are eating dead bait or killin some of the bait.