On Wed, 18 Jun 2003 15:53:51 -0600, John Rutz
wrote:

What is KH and what is GH? pH I know.

Kh calcite hardness GH general hardness
John Rutz

And good KH is important so your pH doesn't fluctuate wildly from AM to PM.
~ jan

See my ponds and filter design:
http://users.owt.com/jjspond/

~Keep 'em Wet!~
Tri-Cities WA Zone 7a
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