If the frequent rise in pH and acid addition are an annoyance for you, then you can consider lowering the TA level by following the procedure in this thread. This will also bring your water closer into calcium carbonate saturation balance, though it's only a little over-saturated right now. Since you will be adding some salt, you should target a TA level of 100. If you find that you like the reduction in pH rise and want to lower the TA level more (say, to 80 or below), then you can consider raising the Calcium Hardness level a bit (to 300 or 350 ppm) though this is not critical.

Richard