I have a reoccurring issue with my closed loop system that's restricting flow and causing poor performance and cold children (their bedrooms feel the reduced flow first). The issue is on my radiant circulation side where a Wye 1" strainer with .4mm stainless mesh screen clogs with what I think are mineral deposits (pic attached). I've been noticing reduced flow in my circulator loops about every 4wks and pull the filter to find it nearly plugged solid. The filter is on the output side of my Geo-Stor tank prior to entering the distribution manifold. I filled the system with good 'ol city water 3 years ago. Living in the rainy part of Washington I checked with my local utility and verified that the water is 100% reservoir fed and the mineral content is low. No additives were introduced. The system runs at 100-115F and about 45psi - although I've boosted the pressure several times after finding it running 10-15psi. I have an identical strainer on my ground loop side but that one never clogs. It runs 35-50F depending on the time of season and 40psi. That system has antifreeze added but was filled with the same city water. Question is: Do I need the strainer in this system? I'm only pulling minerals out of solution and depositing them on the strainer (I think...) or should I be concerned about deposits in my water-to-water heat pump too? Is there something I'm overlooking - water additive; drain & refill w/ distilled water; different filter?? I welcome all advice and/or questions! Thanks in advance.