Do NOT use the Slug method because it will damage your pool and it doesn't work.

What you need to do is seek out our section on lowering T/A via the rachet method (you "ratchet" T/A down). Where you are now, you want to RAISE your pH without raising your T/A level.

So you want to aerate your pool till your pH is 7.5-7.8

Then you'll add the muriatic. I wouldn't add more than one cup, and add it to a 5 gallon bucket of pool water first, then add THAT to your pool. Watch your pH. If it gets down to 7.0 to 7.2, start aerating again to raise the pH. If it gets lower than 6.8, you'll need to add Borax so your pool isn't damaged.

Each time, before you start aerating, measure your T/A. When you are below 180ppm, you'll be relatively safe. Below 150, you'll be fine.

But read up...