Did you ever check your DT water with the Hanna checker before you started using the copper absorbing media? I would think you'd be able to see a small signal at least with the Hanna if that was the problem.Yeah, I do, but I’m not sure if the checker would detect the levels of copper in the tank considering the pads and CupriSorb. I think the reason why the tank is doing better for short periods is because the media is absorbing the metals and cleaning the water for a couple of days, but as they become less and less effective, the original issue returns.
Very frustrating. Talk about a money pit.