I'm going to be opening my pool in a few weeks. This is only my 3rd season so I'm still learning. Love this site!.
Last year I tested the water & started adding chemicals the second my cover came off. I know now that I need to run the pump for a day or two before I can get truly accurate readings.
Even knowing that - Should I just assume that the chlorine level is at zero and add some chlorine (I use bleach) right after I take the cover off??? It just doesn't feel right to me to pull the cover and not add ANY chlorine for a day or two while the pump is circulating the water.
If the answer is yes - how much do I need to add if I can't accurately determine the CYA level the second the cover comes off??