2 questions for a 25000 gal, in ground, vinyl lined pool:

1) Ph is above 15, how do I reduce?

Why is my ph above 15 you ask? We had to replace our pool liner and are re filling with a friend's professional water truck - the first load was well water, the second was clean lake water (clean as in little sediment). Since his Dad is doing us a great favor, we okayed him filling in 10 min at the lake rather than 1 1/2 at the well. What we're saving on the water will be huge compared to what I may have to put in time and bleach.

Here's what I have for our current 8,000 in the pool (will be 24300):

FC 0
CC 0
TC 0
ALK 12
cal 14
ph 15+

I got the 15 by diluting the sample water with 1/2 distilled water so I could get a more accurate read after the first one was darker than 8.

I'd like to get a start on making progress and keeping what is in there at bay while it takes a few days to get the rest of the water. The truck needs a minor pump repair to get going again.

2) I am sorry Ben is MIA - hope he's OK. When I'm looking for replacement tests, is there any reason I need to worry about calcium with a vinyl pool? Or should I ignore this test.

Thanks!