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Hi, I shocked 6 days ago to a level of 10. There was some algae present & it went away after I shocked. The next day the level went down to 5.5. The CYA is low (maybe zero, my test tube doesn't go below 30). Today the chlorine level is at .5 (combined chlorine at 0). I bought some stabilizer &...

Can you tell me if these products are OK to put in my pool to increase the CH? https://www.amazon.com/dp/B00SJXAIMA?psc=1 https://www.amazon.com/North-American-Salt-50850-Chloride/dp/B002Q152VI/ref=sr_1_15?ie=UTF8&qid=1470498564&sr=8-15&keywords=calcium+chloride...

Hi, I'm new to this website & forum. I am looking at the Pool Math calculator & trying to figure out what to put in the Temperature field. Should that be air temperature or water temperature? Thank you for your help!