Started having some slow to slowly increasing STN in many SPS colonies over the past two months. Only significant thing I can trace it to is neglect in changing my RO filters (did last night). My TDS was showing 1 after the DI before the filter change and 0 now. I’m concerned due to the fact that I found where my local tap water has a noticeable level of copper in the water quality report. An old test kit shows a very faint change of color indicating some might have gotten through to the tank. I picked up some cuprisorb, but don’t have a bag small enough (it’s like DI resin) to keep it in. I put it in an Avast media reactor, but despite the sponges to hold it in plaxce, it fluidizes and tumbles around. Is that ok?