Richard -

Thanks. I have been following your posts for quite sometime.

I understand the affect of Dichlor and CYA. That is one reason that spas are "recommended" to have water changed every 3 - 6 months. I was concerned about the TA getting too low but if you think that 70 ppm is ok -- and that is where my point of pH stabilization occurs, then I am all for it. I thought that hitting around TA 100 would keep my pH stable as that is what I read. So, I will just keep and eye on things and see where I get the greatest stability.

As for the bleach -- because I could not find good details on maintaining a spa with bleach (other than a fight on the other forum and not contributors from this group), I went down the fairly inexpensive path that I mentioned. Nice to know that not much has changed in what is prescribed by this group.

Thanks again for your time and wonderful input. Hopefully others can learn from this lesson.

AGE