Lowering alkalinity: PS234 & PH readings

I opened my pool two weeks ago. I never bothered checking PH until after I added about a foot of well water. Then, my alkalinity was 260. At the time my PH was 7.5. I have been adding muriatic acid to keep the PH around (what i think) is 7.3-7.4 and aerating with step jets and return eyeballs pointed up. After two weeks, the TA is down to 190.

I know that I really need to get the PH down lower for the aeration to work effectively. The problem is that I have a hard time interpreting the PH lower than 7.5 on my PS234 kit. I am scared to death that I will get it too low. The lowest I have had it, the sample was almost clear with just a hint of pink. I could see almost no pink if I held the sample in front of the white inner lid of the kit. With a clear sky as a background I could see that it was slightly pink.
Do you think I was still above 7.2 ?

The 7.2 reference on my kit looks almost orange and 6.8 reference looks orange-yellow. I was expecting to go directly form pink to orange, so I was confused by the almost clear reading.

Current readings for 23,000 IG
FC 5.0
CC .5
PH 7.2
TA 190
CYA 30

Well, for giggles I tested my well water PH. It matched the reference for 7.2. So I guess the "clear...slightly pink" sample from the pool was somewhere above 7.2 but below the 7.5