We recenlty bought a house with well water and started having problems with a sandy type substance in our tubs and toilets not soon after moving in. The house has copper plumbing so the previous owners had a company install a Kinetico upflow acid neutralizer. After some investigation, I determined the sandy type substance was calcite media from the neutralizer. (A filter was installed before the neutralizer and it has remained clean with no sandy substance). I installed a whole house filter after the neutralizer and it solved the problem. We started losing water pressure within a few days. I removed the filter and it was covered with the calcite media. I pulled the inlet and outlet on the neutralizer. The screen was installed correctly and the media was around half way up the tank so it looked ok to me. Is there anything else that can cause the calcite to wash out of the tank and into my piping?