Thanks for your responses. I missed the whole 'little separate vile' thing. So I tested my CYA and it's 25-30 ppm. I tested twice to be sure.
I have a vinyl pool with SWG. The timing of my installer just dropping by was perfect. In two days my pool has gone from crystal clear and me bragging to everyone (including this forum) how I haven't had to do anything to it in a year, to an emerging cloud with high pH.
Steps I've taken: I've added 4-5 lbs of what I thought was dry acid, but apparently isn't. BioGuard Lo N Slo pH and alkalinity decreaser.
I shocked the pool with the SWG.
Yesterday, pH was 8.0 and Total Chlorine was 2. I did not have my K2006 test kit until late in the day.
Today, pH is 7.6 Free Chlorine is 5. TA=140, CH=150/160 CYA=25-30
Pool store says don't add more than 2 lbs of lo N slo per day. Should I add more to bring down TA?
Edit: For the record, the cloudiness could be a result of the fact that we've had 2 lengthy, serious downpours over the past 2 days, which aside from adding 2 inches of water to my pool, also lured 25-30 frogs into the pool each day.