had the same problem

[Gotsoup]

I have had success with Copper Power. It did not kill my hermits and my fish handled it very well, including a yellow tang and a Porcupine Puffer. It seems to be less toxic and it does not stain seals. It "claims to be "non binding" to rock or sand. After running Cuprisorb (which is a fantastic product) I was able to keep a shark in my tank, which is incredibly sensitive to copper. I copper powered my tank twice and actually kept the product in it for about 3 month until removing it. Hope this helps a little.