Chlorine & Algaecide addition's in the Winter

[waste]

Carl, I agree, without flow, a 'plug' of cl could possibly damage the liner. I may not have been 'crystal clear' on my advice on adding bleach, but what I was saying is that if you need to add a gal and don't have any circulation, peel back the safety cover on one long wall and add it, at arms length (#3 in one of your old posts), going from one end to the other and back to add the gal. (BTW I'm at ~ the same latitude - if I headed due west out of my condo, I'd be within 10 min of Mawah, and about 20 min from my old house in Tenafly - when I closed 2 pools Wed, the water temp was 47 - 50 deg (I don't know if a mesh cover retains heat, but uncovered pools in Ct are below 50 deg).

[CarlD]

I'm about 15 min west of Newark--a little south of you. I think mesh gets colder than solid...if you think about it. There's no barrier to heat rising, no greenhouse effect. Plus the mesh allows evaporation, which also keeps the water cooler.

I would say, if the water is pretty clear and 50 or below, don't bother adding anything. In fact, unless you have a reason to, I prefer, myself, to leave it alone. It's going to get colder--this absurd heat wave cannot last.