I was using Calcium Hypochlorite occasionally as a chlorine boost; however, after using a few bags my filter would start to clog. I used RE-FRESH brand. It is 68% Cal Hypo and 32% Other Ingredients. There seems to be a lot of insoluble ingredients. My question is: Why add this stuff if part of it is insoluble and will just clog my filter? Is this a side effect of using Cal hypo no matter the brand?