yeah i have one and it basically adds O3 ions to the water which is highly reactive with waste particles. ive found that my tank looks clearer with it, but I ussually only run it in very small doses or not at all, depending on the oxygen redox potential, ORP, which basically indicates the amount of oxidation reactions in the water. i think i enjoy it more because its neat rather than its actual use! who doesnt like tinkering with crazy stuff in their tank!