Unfortunately I have no record or recollection of my CYA of last fall. One of the reasons I am now starting to record it all to eliminate guess work (second year pool owner).

I did submit my tonight's numbers (Yesterday did the usual 10 gallon Liquid Chlorine and brush job).

Finally FC seems to hold at a higher number, Used K2006 kit to measure 12 ppm as ColorQ as expected reported hi for reading (limit 10 ppm unless using workaround). Also used K2006 for ALY measurement which was similar to ColorQ.

CYA measurement done with ColorQ as K2006 didn't yield any noticeable measurement which might be user error as was first try. After mixing 7ml of pool water and 7ml of the agent and mixing for 30 seconds the mix was clear and not obstructing view to the black dot in the tube.

Can now see vacuum at bottom of pool and it looks like the chlorine is starting to do something. Not sure why it now starts to do it's job. We had rain and thunderstorms last night and during the day and this added 2" water to pool. I am aerating non stop and not filtering.

Didn't have a lot of time tonight. Added 2 gallons of liquid chlorine and did a very quick brush job. I did read about the CYA potentially being biodegraded. Not sure if tonight's measurements are an indication or of any help.

Thanks again.