Ok so I did the 6-way HTH test.

Cl and Br didn't register at all. (Water stayed clear, no yellow tint) We put about 1/4 gal of bleach in there last night, but it probably has disappeared already.

I did the CYA test, but probably should've skipped it. That water stayed clear, so no result on that one.

Ph was 7.2. Yay!

Hardness was 170 ppm, which it says is a bit low. Surprizing after using some well water, but I don't think this is a big concern because it is a vinyl pool, correct?

Alkalinity came out at 120-130. It was almost red at 120, but I put another drop in there to be certain. This is a little high. Do I need to be concerned about this?

SO I need to get more bleach in there and some CYA, right? How much CYA for a 3,800 gal pool? Is there a formula somewhere?