I've had this pool for over 20 years. Re-built it 4 years ago with pebble-sheen, new tile and coping. I've fought pH forever. Getting scale on the tiles. Installed a SWG 2 years ago as well. Pool has built in spa, non-heated, just bubbles. Pool is crystal clear. Sand filter.
pH: 8.4 (guess, over test kit range)
FC: 17 (just super shocked due to black algae) Clorox
I just added 16 oz of Muriatic Acid this morning, will check the pH tomorrow. By the way how long to let acid work before re-testing?
I think I know how to lower pH but it never stays low. Any input out there?
The SWG can't keep enough Cl in the pool so I think I need to raise the CYA to about 70-80. I'm worried about that as I did pucks for years and cya got out of bounds.
But in Central TX, sun eats a lot of Cl.
Pool size 13500 gal.