i have read horror stories all over the place , i could see if its one tank but 3 tanks is reall rough , making 125gallons for a water change is crazy . this trial recovery is going to take a toll on the wallet . I hope I can recover most of my coral . I know we can test copper but I think its more than just the one source . I will say it was a carbon , not the NOPOX. I hope to talk with customer service in the am before I make a big deal about this product . I will keep you posted ! I hope the company makes this work out . Its all priceless stuff , $40-80 frags that have grown out for years . If i lose it all I may not come back to the hobby . I have spent more money on safeguards and technology to avoid these problems than I can count , one simple dose of a product can change my whole attitude on the reefing hobby . I want to go to the ceo and put it in his or her display tank and see how they feel ! they probably dont use their own products . what happened to quality control ? I put my hard earned time and money into this tank ! I am soooo bitter right now . I have a family that dosent need me falling apart over this tank !!!!!!!! I am trying to stay positive .....its not working !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!