.....im not sure about that idea. I'd rather remove it from the aquarium. Keeping it in the tank doesn't remove it, it just contains it to one spot....i actually do have one of the metasorb pouches in the sump right now, it was recomended by jen at new wave along with the cuprisorb(not sure why i kept thinking it was purigen), i will be leaving both of those and a small chunk of poly filter pad to get a visual until i am confident that the copper is gone and i might keep the cuprisorb in the tank long term just incase something like this happens in the future since it seems like there is no downfall to keeping it in there.
