On Mon, 26 Jul 2004 06:27:45 -0500, "Jim and Phyllis Hurley"
wrote:

GH 75
KH 300
ph 9
Nitrates 0

Looks to me that the ph needs to come down and that that may be contributing
to the problems of the WH.

How do we lower the ph effectively in a cement pond? It is in fact higher
than usual, generally, we have been in the 8 range.

pH Down - -
Muriatic acid (31% HCl) a doses of approximately 2 fluid ounces per
1000 gallons per day until the pH is about 8.5. I would not lower the
pH below 8.5 without also testing KH (alkalinity). Acid directly
consumes KH. If KH is lowered below ~100 mg/l, pH will become
unstable, and the pH measurements become meaningless.

Regards, Hal
http://members.cox.net/hrclark1/Index.html