***Be Sure to Buy the ORIGINAL NRG Leak Detecting Tablets! Don't get cheap imitations! We provide full color instructions on a full color card and information on our product. -------NRG Tablets provide a strong visual for east detection------Save money and save water by detecting silent leaks with our package of 2 dye tablets. Simply drop tablet in tank and know in a few moments if a repair needs to be made. Tablets are non-toxic and FD&C safe. Instructions in English and Spanish. One of the most effective water conservation measures you can take. Dye tablet 10 pack. ---------NRG Authentic tablets have a strong blue visual! -----NRG is an WaterSense Listed partner, be sure to look for the label.