How often should I test my pool? I was doing all the tests everyday and ran out of CYA very quickly. If I just do CL and PH every day and add Bleach as needed for CL, should I do the other tests weekly? What's a good CL level to maintain? I have AG - 8,500 - Sand Filter. I seem to be running about 2 - 2.5CL, with good PH -- just above 7.5.