Hi, Kerrie,
Wow, you have quite a coctail there....the first thing that you need to keep in mind is to add things in small amounts, and one at a time, to keep things from really getting out of hand and making a mess like the one you have on your hands. First of all, the amounts of arm and hammer and Borax that you added at once are probably the majority of your problem. Did you add them through the skimmer, or broadcast them over the pool? Make sure that you're keeping your pump/filter on 24/7, and that should help clear it up if it's suspended powder in your pool.

Secondly, your pH change with a given amount of Borax is going to depend on your total alk and pool size at the time you add it. Generally it's best to start with a small (or in your case with a very low pH, medium) dose of Borax, give it a little time to circulate, test, then adjust as needed to get to your target. Same goes with alk--it's best to add a little, then test and add more, since lowering alk if it gets too high can be done but it's a pain to do so. Also, the next time you find yourself needing to raise your pH and your TA, use A & H washing powder--it'll raise both pH and TA at the same time.

Third, I hate to tell you this, but you got pool-stored with the phosaway, which you don't need--phosphate removers are a great scam for pool stores to sell you something that you don't need and make large profits for themselves. I'm assuming that the "UV shield that you added was CYA, or cyanuric acid. If not, add that to the "pool-stored" list. If so, did you broadcast it, or add it through the skimmer? If you broadcasted it, make sure to vaccuum up any that's sitting on your liner and let it dissolve in your filter. If it went in through your skimmer, make sure you don't retest for it or backwash your filter for about a week, because that's how long it takes for it to completely dissolve. Also, I don't recall offhand the gallonage of your pool, but keep in mind that once your stabilizer is in the pool, there's no getting rid of it to lower the levels except to drain and refill, so you don't want to go overboard on that, either.

The polyquat is okay, but it isn't necessary if you keep your chlorine at appropriate levels, and the addition of polyquat after you add chlorine will completely deplete your chlorine level, so you'll need to add more to get it back up again.

I hope this helps. You can do BBB without many problems, but don't let the pool store sell you stuff you don't need--that's the whole point of the BBB system!

Janet