Quote Originally Posted by CarlD View Post
That's right. We use what has worked for us consistently. I use polyquat, Watermom doesn't. We both open to clean pools.
Who is right? Both of us.
Might this indicate that the polyquat is unnecessary for closing, at least if you close late and open early?

If I remember correctly, both of you close once the water temp drops below 60 and open before it gets much above 60? Perhaps in this case just shocking is sufficient?

I imagine the type of cover used also factors into when to close/open. I know you use a mesh cover and Watermom uses none. I use to use a mesh cover and discovered it was important that I close/open according to water temp (60) like you and Watermom. Since using a solid cover, it doesn't seem important when I close or open. One year I didn't open until about June 10th (waiting on liner repair) and the water was still clear when I removed the cover.

Btw, last year my closing method was shock, wait a day, add polyquat (1 qt) and cover (solid cover). Water temp was in the mid 60's when I closed (early October) and close to 70 when I opened (early May). Water was clear.

I'm just wondering if adding polyquat is really helping or am I just wasting money. Perhaps since I keep about 60ppm borates in the pool and use a solid cover adding polyquat is unnecessary?