Math/New Water Help

[elsie]

Hi Carl, Waste and Richard,

I know better than to *not* post all the salient numbers, geesh! Here they are as of last night:

CL 4.0
FC 4.0
TA 220
pH 7.5 (having added box of Borax)
CYA 50-55
Solid winter cover still intact

I now remember that when I had the new liner install in the Fall I kept the pool open just long enough to put stabilizer in and get it in the 50 ppm range along with, as I vaguely recall, about 5 ppm of CL -- I didn't shock as it was a brand new liner and I didn't want a high level of CL for the 8 months it was covered/closed as in the past I lost only about half the CL over 8 months with the winter cover on. So the CYA level has held but the CL has not.

My Alk is high. Typically it runs around 180 without any issues, not even cloudy water. I just perused the Stickies on lowering Alk (by lowering pH and aerating) and have printed. Although I don't have any kids or fountains, will it be sufficient to turn my two jets upward to create air bubbles? In any event, this will have to wait until I uncover the pool. At that time I will also give the water it's first shocking. Frankly, in years past I never tested for TA during the winter/covered months and for all I know it was always much higher then but then perhaps fell to its set-point of 180 with a small amount of aeration going on from the jets and my own daily laps.

So I suppose I could wait a stretch and see if the TA naturally falls or I could manipulate through the proven process. Is the latter preferred or is there little harm in just observing the pH and TA for a stretch?

I won't worry about the CL right now, as shocking it when I uncover it should resolve any issues. If there is some (invisible) algae and doesn't test out as CC or tinted water (it truly is as clear as it can get), I'm thinking one shock instead of keeping the CL at shock value for an extended time should be appropriate? As you can see I am a trifle nervous about subjecting the new liner to high levels of chlorine. Of course, how stable the chlorine level is after that will tell me a great deal and probably answer this question itself.

It looks like I won't be opening until the weekend after this upcoming one because the trees are in their final fit of shedding little oblong gifts that rain down which can clog the impeller. I'll report back and let you know how this all goes.

Thank you everyone for your input, as always. And Waste, good analysis of PF and how it relates to TFP (which I once registered with but have never posted as PF is where my mouse continues to take me) and this forum's incredibly rich history - and what could be called its living legacies. I, too, am still thrilled it continues -

Elsie