What has come to my attention just recently is due to the fact that I was not monitoring CYA as often as I should because I was under the ignorant assumption that I was not adding CYA. After looking carefully at the product label, I see now that the New Water cycler pac uses trichlor and therefore has been consistently adding CYA.
I maintain a strict log and therefore have a full history of this past season. Testing was accomplished primarily using the Taylor kit with values checked against the pool store from time to time. In those cases, values were remarkably close that my values from the kit are what I'm reporting.
At the start of the season CYA was at 3 ppm. I charged enough to bring it to 30 ppm. It is now at 60 ppm and I have gone through 6 of the cycler packs since May 4th. The packs contain 6.16 lb of trichlor.
Here in the north east we have not had a substantial amount of rain and therefore I have only bled about 2" of water all season (maybe a little more). For my pool, 1" is roughly 500 gal.
I plan to keep the pool open for another month. Doing some simple math, I come to the conclusion that I will not reach a steady state of CYA this season. Nor will I have draining the pool for closing and much into the next season.
It seems as though I should be maintaining the FC levels using NaOCl (liquid) now and through next season until levels of CYA drop. At that point, I should be able to go back to the automatic chlorinator, but at a low level while monitoring the usage and CYA concentration, toping with NaOCl as necessary.
I would appreciate any corrections or further information to my understanding.
As is typical with most postings, here are my current levels:
Algecide 60 added once a week (small amounts)