This mornings readings are:
Hardness =0
CL=3 (Walmart 6 way kit only gives one CL reading. Is it total or free?)
TA=150
PH=7.2
CYA=100

I have been trying to lower PH to begin aerating to lower TA. (as learned in the forum) Adding lots of muratic and dry acid. Finally dropped to 7.2. I guess I need to take it a bit lower?

I have learned that hardness is not critical for vinyl pools but how about fiberglass pools?

I have also been doing partial drain and refill to lower the CYA but is is a slow process as I do not have a bottom drain. I can only do about 5 inches at a time and with my work schedule that pretty much means on the weekends.

Am I in a catch 22 adn trying to adjust too many things at once? I am converting from 3 inch tabs - hence the high CYA ( I was at 200 when I started). So does the partial water change cause the high TA?

What should I focus on first?

Thanks, you guys are great. I have learned a lot from the forum, now just to put it in practice and take control of my pool...