Matt from Hapeville, Ga writes
BTI Dunks are not listed to be used in water barrels you will be applying to edibles. BTI dunks are to be applied to bird baths, old automobile tires, rain barrels, ponds, abandoned or unused swimming pools (particularly above ground types), ditches, tree holes, roof gutters for collecting rainwater, flower pots, animal watering troughs, waste water treatment plants, elevator shafts, basements that flood, sump pumps and any drainage areas within buildings -
Answer last updated on: 07/08/2014