Can someone show me the math to calculate how much a 3" trichlor tab gives in free chlorine. I've seen the "results" that tell me but I was curious about the calculation. I can figure out the CYA portion and how much it contributes in ppm, but I am missing something with the Cl and it is driving me nuts. It the overall pool care scheme of things, I don't need to know this level of detail, I just want to. So just for a fun question that the chemistry whiz out there loves to answer?????
Also, I SLAMMED my pool last couple days. I slammed because I saw a few small deposits of algae on the steps. I've had no issue with water clarity or CCs to indicate algae starting and my Chlorine as never not dropped below levels needed for my CYA of 30. But obviously something was going on so I SLAMMED. My question is around the drop in chlorine from SLAM levels when done. After passing the 3 SLAM tests to say complete, I vacuumed out the little bit of algae that settled on bottom. FC was at 14 ppm this morning. Within 12 hours the Chlorine was down to 6 ppm. I was quite surprised at this rapid drop since my daily chlorine demand has been around 2-3 ppm. I'm in Memphis and it has been very hot this week, but 8 ppm in one day seemed high. Is it normal to have rapid drop in FC when your levels are high.