Alk? What does 9.6c mean?

[robocop]

I have a Milwaukee PH/Alk tester that I used to measure my Alkalinity…..it read 9.6c but I don’t know what that means. How do I convert that into (1 meq/l = 2.8 dKH = 50 ppm CaCO3)? I read that recommended Alk is 3-4.5meq. Also, can that Cal Solution go bad? I've had it sitting for a while.

 

[steve-s]

9.6 DKH = 3.43 mEq/l

Divide the 9.6 by 2.8

Cheers
Steve

 

[JG]

Also, can that Cal Solution go bad? I've had it sitting for a while.

Not so much "going bad" as perhaps reacting chemically with the air. Do you have white stuff at the bottom of the bottle? If it is kalkwasser the Cacium Oxide which is in solution will react with the carbon dioxide in the air inside the bottle and form bicarbonate. The carbonate will settle out on the bottom of the bottle.