Pool liner feels like sandpaper

[PoolDoc]

Use these forms to record your test results -- I did your last two.

Pool History Entry Form
Pool History Results

What is the quickest way to increase the CYA?

Using dichlor powder, to chlorinate. Buy the PoolBrand 24# pack of 1# bags at Sams if you can; otherwise, buy a few bags of goop (diluted dichlor) locally, and order this from Amazon:

Kem-Tek Dichlor 22 lbs

On your pool, a pound of undiluted dichlor will add about 2.5 ppm free chlorine, and 2 ppm of stabilizer. Of course, the diluted dichlor sold by Walmart, Kmart, Costco, and mostly, by Lowes, HomeDepot, etc. will add less, depending on how much it's been diluted.

Also, my ph jumps up pretty easily, which I think is due to the alkalinity.

As your TA drops, your pH will rise. Just keep adding acid. This is what you WANT to happen. To remove the scale, we'll want to get your TA as low as possible. When it gets below 80 ppm, you'll begin stripping the scale.

Once I add the muriatic acid, how long do I have to wait to add chlorine?

As long as you don't pour bleach in the same spot as the acid, you don't have to wait. I'd let it mix for 15 minutes before hopping in, however. AND your pump should be running when you're adding.