Toilet Water Saving Devices - Toilet Tank Bank, Toilet Fill Cycle Diverter, Toilet Leak Detection Dye Tablets Every flush counts and these devices will save you 1+ gallons per flush. 1. Identify leaks by dropping the Leak Detection Dye tablets in the toilet tank. If the the water turns blue, your flapper needs to be replaced. 2. Install the Tankee Clipper or fill cycle diverter. The Tankee Clipper diverts some of the water that normally fills the bowl to fill the tank. It fits onto the fill hose and clips to the fill tube. It saves up to 75% of the fill cycle water, up to 1/2 gallon per flush. This is not a flow restricting device and will not effect the flush power of the toilet. 3. Install the Tank Bank and saves .8 gallons per flush. Easy-to-fill, patented air lock and fill valve. Just fill to the top, snap to close and hang in the toilet tank.