Last year when I purchased my test kit I started with a CYA 120.
At the end of the season after a partial water change I was at 80. When I opened my pool yesterday I was expecting to see around 60. I am seeing zero. Very surprised. I figured at most 25 percent water replacement over winter. I have a solid cover and did pump at least of foot of water off it into the pool.
I am still useing the solution that I bought last June and will be ordering some more this week. I didn't think this went bad so I trust the results.
This morning 24 hours after opening the pool I am seeing fc= 3.0 cc = 2.5 and the water doesn't look that bad for only being open only 24 hours. Not sure how to proceed. I have about 40 pounds of pucks left over from before I switched to only liquid. How long would it take to get CYA back up useing just the pucks and how many would it take. Thanks for any help in keeping me on track.