I have a Tang in QT right now. I added Prazipro on Sunday and made a stupid move Tuesday evening. I fed Nori and there were tiny pieces floating around in the tank. Not thinking, I put in a filter pad (with carbon) into the HOB filter I have moving water in there. It just hit me this morning that the carbon probably removed the Prazipro. Should I just do a water change and treat one more time or do two more? The original dose was probably in about 48hrs or so.