 Now first, one of the easiest and most effective ways to lower your pool heating costs is to use a swimming pool cover. You know, a pool cover helps to retain heat and reduce evaporation, which means you won't need to use as much energy to keep that water warm. Now next, managing your pool temperature. It's really another key factor here. By keeping that water at a consistent temperature and not overheating it, you can save a significant amount on those energy costs.