"Richard Ryerson" wrote in message
...
Just thinking out loud here, but I would think too much Mg would cause the
Alk to lower.

Doesn't Magnesium attach to carbonate ions? For example, if you are having
Ca troubles, (can't maintain a decent level, say 375+), check on the Mg
because it may be low causing the carbonates to attach to the Ca forming
calcium carbonates.

Just a thought.

-Rick



That's interesting. It turns out my Mg is just over 1500 ppm
Maybe that's why I have low alk? Hmmm....

~Mort