For years, a water-saving tip has been floating around the internet, suggesting that you put a brick into the water tank of your toilet. The idea is that the brick displaces water and turns a water-guzzling toilet into a more efficient one. But the reality is that while you do save half a gallon of water per flush using this method, it can ruin your plumbing. Bricks will disintegrate over time, and those particles and chunks will clog pipes. If you want to get the same effect without hurting your plumbing, try filling a plastic tub (like for margarine) with water and placing it inside. It'll do the job without disintegrating.