Go ahead and use some muriatic acid to lower the pH some. But, please read this page first:> http://pool9.net/muriatic/

Don't worry about the alk for now. Actually, it is not a problem right where it is unless your pH starts bouncing around. With the high CH, you'll want to keep pH and TA on the low end anyways.

What is your source of fill water that has hardness that high? OR, are you using shock that has calcium in it? What are the ingredients of the shock you are using? What did you use last year as your source of chlorine? For now, just use bleach.

What is the wall height of your pool? Do you have a dug out deeper middle section? I'm a little skeptical about a 4.5ft deep AG pool.

What kind of test kit did you buy? Does it have an OTO chlorine test (yellow drops) or a DPD chlorine test (match to a pink comparator?)

Try and scoop out as much debris as you can. Answer the questions I asked above and then I'll better be able to make suggestions for how much bleach to add. Walmart's generic 8.25% unscented bleach is fine and what most of us use. While you are there, also get a jug of distilled water.

Repost with the answers to the questions and then someone here can help you go from there.

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