Thanks Richard. I guess corrosion could be a concern. I have an AG pool. I don't use a heater, but I suppose the pool walls and pump shaft are possible corrosion concerns? Below are my current numbers,

pH: 7.4
FC: 5
TC: 5
CYA: 30
Alk: 50
CH: 10

As noted, I have very soft water, so yes CH is only about 10 ppm. Next season I plan to replace my pool liner, so I will be draining & refilling. At that time, I may use Calcium Hypochlorite for a while to get the CH up some.

Also, how would adding salt affect this? Next year I may add salt after reading some dicussions on the board. Would adding salt just put me in a more corrosive environment? If I continue to run at low Alkalinity, is there anything I should do to minimize corrosion?

Thanks again for your insight and suggestions.

Jim