Thread: Brown water!
View Single Post
  #14   Report Post  
Old 12-05-2007, 04:10 PM posted to rec.ponds.moderated
Hal[_1_] Hal[_1_] is offline
external usenet poster
  
First recorded activity by GardenBanter: Jul 2006
Posts: 366
Default Brown water!
On Fri, 11 May 2007 08:57:34 CST, wrote:

resist any temptation to use the "pH pill" or plaster of paris, this
makes the pH swing wildly for some reason.

I never heard that before and don't understand it. Calcium carbonate
is the calcium that buffers pH. Calcium carbonate stops dissolving
into the water, when the water reaches a pH of 7.8, although calcium
may continue to add to the general hardness of the water GH does
little or nothing toward buffering pH. Calcium carbonate, in the
form of calcium sulfate, increases the KH when introduced into the
water at a pH of 7.8 . So how does increased levels of calcium
carbonate cause wild pH swings?

Regards,

Hal

Reply With QuoteReply With Quote