so first time poster never really ran into this have had the pool 12 seasons and never had any issues. I test water with strips every few days, test kit weekly and took to pool store a few times a season just for a full test always ok. I have bought my 3" tabs from Lowes or Walmart put them in clorinator and no issues. I always had the setting on clorinator on 2 and tabs would last about a week and chlorine was always good. So both walmart and Lowes changed the brand to Clorox and I noticed two things. First my chlorine was extremely high, and second the tabs were gone much quicker so apparently they dissolve quicker. It was so high the strips indicate at least 10, and the test kits was a funky color for chlorine as well as PH and Alky. I went to pool store(leslies) and they tested said chlorine was over 20 and I shouldn't go in it. They had chlorine reducer which I used to get it back to below 5 as we were having a big party that weekend. rebalanced pool and took it back to Leslies and all in range.
SO been using the newer tabs with a much lower setting to keep chlorine in check no issues. So went to get a water check at pool store as my chlorine and balance looked good, but I was getting a little green algae on walls. They came back and said CYA was 120 which is too high as it reduces efficiency of FC. My thought is this new tabs from Clorox have a ton of CYA in it. That's what's brought me here I had no idea about CYA and learned a lot looking here.
So with high CYA I need more FC which is why I was getting algae. My kit only goes to 5 and in dumping 1/3 of my water and replacing got it to 80 which means I still need 5-9 PPM of FC. In doing research it appears that's safe if the CYA is that high. I would like to get the CYA down so I can run lower levels of chlorine so looks like I need to stay away from Tr-clor tabs.
here is where the pools at, the pool is clear and looks sparkling.
Moving forward what to do? I want CYA to reduce so I can run a lower FC level. Will CYA reduce over time with evap and rain if I use just bleach or Cal-Hypo?
Benefits, drawback of Liquid bleach?
Benefits, drawback of Cal-Hypo?
Which is better for pool and cheaper bleach or Cal-hypo?
Does having a high FC affect PH and TA tests?
Does a high FC with a high CYA affect liner or bleach clothes, or hurt hair/skin?
If liquid bleach what brand where to obtain walmart?
Same with borax and baking soda what brands don't want perfumes or any other stuff in there.
Of course pool guy said not to use liquid bleach....