Opened the pool at my new place for the first time on Saturday, and with the help of the people in these forums, I have everything balanced and the water looks great! Two questions concerning CYA:
1) My pool is at least 30 years old and the previous owner has been using chlorine tablets the entire time. I was expecting to open and have a huge CYA problem, but that was not the case. My CYA was only 30. If the tablets are so discouraged because they increase CYA, then how could a pool which has only been chlorinated with the tablets still have a low CYA?
2) I had planned on using only bleach, but the previous owner left a whole container of trichlor tablets. Since my CYA is on the lower end (30), is there anything wrong with using the tablets? Of course I would keep an eye on the CYA and switch back to bleach should the CYA climb too high.
Thanks for the help!