My Endless Pool is running (finally). Their manual recommends the following levels (we are using the Nature2 system):
TA - 100 ppm
CH - 180 ppm
pH - 7.5
Free Chlorine - 0.5 - 1.0 ppm

My latest tests results (Taylor K-2006) after adding 1.5 lbs sodium bisulfate:
TA - 140 ppm (was 180)
CH - 100 ppm
pH - 7.6 (was 8.0)
Free Chlorine - 0.4 ppm
Combined Chlorine - .4 ppm

The pool has a retractable cover that I have been using but after reading here about aeration and alkalinity, I rolled it off and started the swim drive on high that roughs up the water a bit.

I am working on the TA first (according to the Taylor testing manual), so I intend to add another 1 lb. of the dry acid (yes?) and add some more chlorine powder, both of which came with the pool kit.

I read some of the sticky notes about calcium hardness and was wondering if I need to do anything with that since I have a vinyl liner. Does anything else matter with low CH?

Thanks for such a great forum!