If you have a really old toilet it might be costing you money. Older toilets typically used more water per flush than modern ones. Over twenty years ago toilets were only to use a gallon and a half of water per flush. These toilets early on in there existence were bad flushing, would leave debris behind and so on. This would cause double flushing or other actions to clear and is a waste of water and money. Not to mention a huge hassle. The new toilets that are available today are much better at both saving water and creating a strong flush. Also they are offered in many shapes and heights to accommodate everyone. One toilet I recommend is a Kohler Cimmeron, Kohler has a very good product line of water saving toilets all together.