I am beginning to wonder if we will be able to enjoy actually swimming in our pool or just shocking it continually until we close it in September.

After 3 or 4 days of solid rain I elevated the CL levels anticipating a problem I developed after a hail storm last month. Yesterday I added 288oz (2.25 gal) of chlorine to maintain what I thought was 15.5ppm. I've been using 15,000 gallons for volume per the web site of the place I bought it at, but saw this morning that Mikes calculator has it at 11,430 gallons for a 15 x 30 AG oval, so who knows how high I was actually shocking it. It went like this:

Monday 6pm shocked to 15ppm at sundown
8:20am - 15.5ppm
1:00pm - 12ppm added 104 oz
3:30pm - 13 added 80oz
6:21pm - 13.5 added 56oz
10:24pm - 14 added 48oz
7/12 8:00am - 16.5ppm ...thought my problems were over
3:00pm - 8.5ppm

It looks like my CL went up overnight, but that's probably because I was using the 15,000 gallons to calculate. I can smell the chlorine smell.

CYA 30-35 (I can see the dot better the lower I hold the tube I figured out today)
PH is usually 7.4 I have to add Borax all the time to keep it there.
ALK is 110
Vinyl liner
temp: 78 low in morning to 82 high in afternoon w/ solar panels
water is clear and sparkling. No one has been in the pool for 12 days. Clean baskets regularly. Backwashed 3" from rain Sunday.

Do you think being in Colorado at a mile high makes me burn more CL than everyone else? Is that even more a reason to raise my CYA?

I'm trying to avoid waking up to green water by shocking before I have a problem. I'm wondering if I should let it go green to see if I really do have a problem or am just imaginging it all. Help.