What is the ingredient of the super shock? Since your calcium hardness is 200, I'm guessing it is probably cal-hypo. Don't add any more extra stuff from the pool store. They typically don't help. You may have to ask your pool store to check your stabilizer, but just don't buy a bunch of stuff. You need to get a good test kit. We recommend the Taylor K-2006 or 2006C. See the Amazon link in my signature below. Only buy if the seller is Amato Industries.

Many of us use bleach for our chlorine. Do some reading here on the forum and also on our sister site www.poolsolutions.com What is the volume of your pool?