Ultra Big Blue Toilet Bowl Cleaner 8.5 OZ Sodium Sulfate Enzymatic 12 Count/Pack 4 Packs/Case 48 Count/Case

Ultra Big Blue is an automatic in-tank toilet bowl cleaner. It fits a variety of different tank styles and freshens for up to 900 flushes. Big Blue's increased concentration of surfactants cleans even better than before and leaves the water a light blue color. Simply drop Big Blue into the toilet tank and that's it. You get a clean fresh toilet bowl with every flush.