We are located in northern California. Although the weather had been unusually warm for this time of year, the pool water remains cold - around 50 degrees. So instead of adding chlorine to the pool, I just use 2 tablets. The pump runs for 4 hours at night. Last weekend, the water looked a little bluish. I did not not add chlorine to it until this weekend. The test results from yesterday afternoon are:
CYA 60 ( I think it is low since I tested in cold pool water)
I added more chlorine after the test so it was at 16 this morning. Because the water still looks bluish, I added another half a gallon of 12.5% chlorine. The pump now runs for 5 hours instead of 4.
My question is: what is making the water look bluish? Also, it does not look clear.