yes, im very proud of purchacing the sterilizer, its worked wonders , and talk about clear water !!! it looks like all my fish are floating in air !! honestly, it works very well, i have a 125 fish only tank, Lion,Sohal Tang,Flame Angel,Clown,Firehawk,Niger Trigger,and plenty of Hermit Crabs, oh and a Domino Damsil,and a Sailfin Tang, and their all doin great, NO ICH !!! Good luck !!