David Sanders (dngspot) wrote an article entitled "How to Recharge DI resin". I would like to know what DI filter he was using that had loose resin easily removable for recharging. I am a potter and make my own glazes. The water for the glaze must be relatively free of calcium and sodium. I'm using a DI filter that has cartridges that cannot be opened to access the resin. Being able to recharge the resin would save me $$. I'm knew to the forum and tried to post a question to David Sanders but failed. Help from anyone who knows which filter he used would be appreciated.---Guy