The EKO KLOR Solar Ionizer dynamo can cut chlorine usage by up to 80% by combining the power of the sun with an underwater sacrificial anode. The system works when solar energy strikes the top mounted solar cells causing electricity to flow to the copper electrode, releasing ions into the pool water. These copper ions are very effective at killing algae and keeping your pool clean and pure. Simply drop EKO KLOR in your pool and it begins killing algae. It is eco-friendly, non-chemical, non-toxic and super safe. You can swim while the unit is in the pool. Purchase an EKO KLOR unit this season and drastically reduce your chemical usage, while using safe non-toxic ions to purify your pool water.