Hello I just joined TFP today, I moved into a house 2 years ago with a 16,000 gallon in ground gunite plaster pool. I've never owned a pool before and Last season I was bringing my water to Leslie's Pool to get tested and was spending a fortune on chemicals and my water was never crystal clear. This year I bought a Taylor test kit and will be testing the water myself and will be using the BBB method I've been reading about. I drained my pool and pressure washed it, and as of now my chemical readings are PH 7.4, Alkalinity 110, Calcium 260, Chlorine 4, Free Chlorine 0, CYA 40. I also bought a Phosphate tester and Phosphate level is 0. My plan is to use cal-shock when I need to shock my pool and 8.4% bleach to add chlorine. My question is when testing the water do I add drops till the color just changes or keep going till it changes and gets darker. Also, which chemicals change the most throughout a typical week or month such as should I test chlorine and PH more often than everything else etc? After adding chemicals how long should I wait before retesting and after shocking pool how long before I should retest? Thanks in advance of all of you help.