SensiPro Blue Granular Dual Purpose WSB is a unique formula in water-soluble bags that works as a colorant and spray pattern indicator. It features an innovative dispersion technology that quickly breaks tension surface and distributes color through the water column in an instant. It transforms dull water into a natural blue or aqua blue hue with a mirror-like effect to enhance the beauty of ponds or lakes while improving its overall health. It also provides a temporary dye to avoid costly overlaps and unsightly skips during application. It consists of 96% pure dye and does not contain any fillers, unnecessary surfactants, or dispersing aids. The waters that were treated may be used for aquaculture, irrigation, and recreational function such as fishing and swimming activities. It is safe to use and will not harm livestock, fish or waterfowl, nor stain surfaces. These soluble bags contains colorant that is packed in a water-soluble film that easily dissolves in waters and provides the natural dye that you desire. They are custom-weighed to meet the required pond and pattern specifications. No need to measure -- simply toss it in and go. Available in 10 x 5 oz. pack.