water balance

Quick back story. Bought our AGP used and recently the salt cell went out. Installed new cell and now paying attention to the chemicals more closely. First time testing chemical levels: Salt 4160 (aquatrol read 0 ppm thought I needed more salt so added 2 bags, found out cell was bad) Free...

Hi, I work at an indoor resort. We have several pools, spas, and waterslides. We occasionally have issues with high combined chlorine. Sometimes, when we treat the combined chlorine, we see no change at all. We utilize multiple methods to treat combined chlorine (oxy-shock, breakpoint, etc)...

After reading the sticky post “how do I use chlorine in my spa or hot tub” there is a statement “The CH level will be used to determine your TA/pH levels.” For the life of me searching through the site I can’t seem to find the answer to this. How is the CH level used to determine my TA and pH...

Hi Everyone, I just received my TF-Pro Salt test kit and ran my first battery of tests. We recently converted to a Salt Water pool using a Pentair i30, and I cannot keep enough FC in the pool. We have algae spots showing up in the bottom in spot-fashion which does not scrub up easily. The...