I've got to leave for a couple of hours -- I'll post more when I return.

For now, read the "Best Guess" page linked in my sig -- it explains a lot that's relevant to your situation. And, if you would, go ahead and complete the pool chart. The output makes it easy for me to see what you've got.

One other question: are you showing any scale formation? Your hardness is high enough to cause problems, especially if you have a heater or SWCG.

OK, I lied. One more thing: test your fill water. I need to know where all that hardness came from.