I have a Nordic Rendvous 2.. My heater went out over the winter during an illness and some of my lines froze and busted.. I have since fixed the heater and the lines, but some of my jets won't work.. I have Purged, Back washed, and pulled my hair.. I am getting what looks like calcium flakes washing out, and have managed to clear most of the jets. Then I get my chem levels up to par and low and behold some will clog up again with the same flakes... is there anything I can do to "eat this stuff up or do I have to live with it until it al finally flushes out.. Any help would be a life saver... Thank you.