On Sat, 24 May 2008 14:23:58 EDT, Chris Hogg wrote:

Newbie here, requesting information. Sorry I can't help with problem,
but for my education, what are KH and GH? pH, NH3 and nitrites I know
about from chemistry, but I've not come across the other two.

Here's a good place to catch up.
http://koiclubsandiego.org/library/preface.php
--
Hal Middle Georgia, Zone 8
http://tinyurl.com/2fxzcb