On Thu, 02 Jun 2005 14:05:35 GMT, " George"
wrote:

That is normal. And a 17.0 ppm drop in your alkalinity is nothing to be
worried about as long as it is in the normal range to begin with(~80 ppm).

You must be right, but baking soda gives higher readings much sooner.
I couldn't keep the numbers up with baking soda though. I even tried
double and triple dosing, but it was gone in a week. After the bout
with string algae I gave up on baking soda and plaster of Paris. I
just use limestone and ignore the numbers until they look better.

Regards,

Hal