25,000 gal vinyl pool.
bought house and continued previous owners routine of adding Trichlor to feeder every week and using simple test kit for CC and PH. Last spring pool turned green and even though CC levels were ok, no amount of shock or algecide would turn water clear.
Through much online reading i found this site and through the use of the proper test kit found my CYA was over 100!
Serious shock with Bleach finally solved the green water and this past winter i drained as much of the pool as i felt comfortable and refilled. Pool is crystal clear and i can see the slight staining caused by the algacide i used. I'll tackle that with ascorbic acid later. just happy to be able to see the bottom!
Now my :
PH is 7.5
TA is 50
I have some Trichlor left from before (3 Inch tabs) and i am wondering if there is a formula for the increase in the level of CYA per ounce of Trichlor for a 25,000 gallon pool.
i don't want to buy Stabilizer if i can safely add CYA with the trichlor, but i am sure you can understand my hesitation in adding the evil tablets to the feeder.