In anticipation of opening the pool in a couple of weeks, I took a water sample from the pool today and tested it. I have a mesh safety cover, so I have drained snow and rain out of the pool several times over the winter, so the chemical concentrations being pretty diluted were not unexpected. The numbers are:
FC 0 (of course)
CC 0 (ditto)
CYA 10 (this is a guess, based on some turbidity in the specimen, but could still see the dot with the vial full)
I am paranoid about damaging the copper heat exchanger, and am wondering if I should dump a couple of boxes of borax into the pool to bring the ph up so that I don't have acidic water moving through the exchanger when I open. If I did it, I would just open up a corner of the cover and dump the borax in. Is this a bad idea? Unlikely to dissolve or might damage the vinyl liner? Or am I worrying too much, should just relax, and add the borax on opening day and the ph will come up quickly enough that no damage to the exchanger will be done?
Also, is there any benefit or harm to shocking the pool now, prior to opening up?
As always, advice is very much appreciated.