Bob,

To lower your TA follow Ben's Lowering Your Alkalinity procedure precisely. You are already at the low pH so you need to aerate your water in any way that you can -- point jets upwards, run waterfalls or other features that would aerate the water, put in a recirculation pump and hose that splashes into the water, get an air compressor and put a nozzle at the end of the hose that creates tiny bubbles and put this into the deep end of the pool, have a bunch of kids (or fun adults!) over splashing in the pool, etc.

As you aerate, the pH will rise so you'll need to add acid to keep it in the 7.0 to 7.2 range. After a while of doing this, measure the TA level and when it gets to where you want it (probably under 100 ppm), then you stop adding the acid and just let the pH go up to where you want it (probably around 7.5).

Richard