My bad on the chlorine reading it is .3 not .03. My tester is a Pentair 78HR.

Not sure what the cya was last fall. In the fall I drain the water down below the inlets and i have a drain in the pool wall that keeps the level from rising above the inlets during the winter. When I open the pool I insert the drain plug and fill with fresh water. When I opened the pool the ph was low ( 6-8 0r so) and I added a box of borax rechecked the ph and it was still a little on the low side so I added some ph plus that I purchased at wal mart. Once the ph was up to 7.2 I added the triclor shock and within a few hours it was gone. The only thing I have been adding is shock either in the liquid form or the triclor granular and ph plus because the ph keeps dropping. Not sure how often I should reshock and should I use bleach or triclor granular. I also have an automatic chlorinator that I have 3" tablets in Thanks for your help