Biosafe ZeroTol® 2.0, 2.5 GallonBROAD SPECTRUM ALGAECIDE BACTERICIDE FUNGICIDE ZeroTol 2. 0 is the fire extinguisher for bacterial, fungal, or algal fires, it immediately knocks out harmful organisms that could damage turf, crops and ornamentals. ZeroTol 2. 0s fast acting oxidation process has broad spectrum application. By incorporating ZeroTol 2. 0 into an integrated pest program, and using it before pathogen emergence, it creates a more prepared growing operation. ZeroTol 2. 0