Pool liner feels like sandpaper

[pleasehelp]

I meant TA down.

[BigDave]

You can move your pH down with Muriatic Acid. See the link in Watermom's sig above for handling Muriatic Acid. This will also lower TA.
Ben recommended that you bring you pH to the lowest on your tester. This is to help with the scaling.
The process for lowering tA is to add Muriatic acid, this lowers pH and TA, then areate the pool, this will raise pH without raising TA. Repeat this process when the pH gets up to 7.6 (maybe 7.4 in your case) until you have your TA at the level you want.

[pleasehelp]

Ok, I have been trying to do as much reading as I can and move forward, but still have a few questions:

Readings;
FC 5
CC .2
Ph 7.4
TA 210ish (I have already added nearly 1 gallon of muriatic acid in the last 24 hours)
CYA 0
I got some of the powdered CYA and added to the skimmer today, 1lb as of right now. From what I understand I need to get the CYA up, currently I am flying through the liquid chlorine. Losing alot during the day. What is the quickest way to increase the CYA? Also, my ph jumps up pretty easily, which I think is due to the alkilinity. Once I add the muriatic acid, how long do I have to wait to add chlorine?

[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.