This is truly an amazing product. I have an indoor pool and struggled during the summer to control algae blooms. The conditions are a spawning ground for algae. I spent hundreds of dollars on shock, algaecide and chlorine. My pool was either a "pleasant" green or cloudy grey from treatment. Either way, no one desire to go swimming. Since we have installed clear blue, my pool is "ClearBlue" . The ionizer stepped up where chemical treatment failed. Thank you clear blue for giving me back my pool with little to no chemical. My family can swim again.