If you keep a CYA of 60-200, and a TC of 1-3 ppm, you're going to have a perpetually green, swampy pool and spa, especially down here in Louisiana!! Take a look at the "best guess chart" linked in my sig. Your CYA level is going to be determined by the manufacturer of your SWCG unit--each of those units has its own requirement to make the unit work as efficiently as possible. Then, your chlorine level is going to be determined by the CYA level (check the chart).

Your ideal TA range on a pool that has a SWCG is around 70-80 ppm. I don't know about the hardness level, I'll get one of the SWCG folks to check it out. I know that calcium buildup is a common problem of the SWCG cells, so I'm not sure of the answer there, but someone here will know.

The K-2006, along with the salt strips, should be a good set up for your testing needs (the testkit link in my sig has info on both of them).