Here are my numbers

25000 gal vinyl pool

Hayward DE3620 Pro Grid D.E. filter W/1 1/2 hp Hayward super pump

Ph=7.2

TC= 5
> This test was more orange in color then yellow
BR=10


TA= 190 PPM

CH Water stayed clear

CYA= 110 PPM or more no reading on tube when black dot disapeared


One of the things I learned late in my fight was to vacume to waste and clean the filter elem often.
Noticed the filter not working well the presure would go up to around 28 and I was not getting enough water presure comming out of the jets so I cleaned the filter element it was redish in color almost like a rust color.
I soaked it all day in Oxy Clean and rinced it throughly did not seam to make a dent in the color. Put filter back together and ran it all night then took my water test this morning.
Water is clear but I still have discoloring on liner.

Thank you for your help.