On Sun, 29 Sep 2002 10:25:36 -0700, "Paul"
wrote:

Checking the CO2 in mid afternoon I find that pH is 7.6 and KH is 10dkh =
7.5 ppm CO2, in the morning after lights on for a couple hours it checks, pH
7.0, KH 9dkh, CO2 = 27 ppm. Is this depletion good, bad or indifferent.

Something wierd there, KH does not change back and forth. If your
test kit is showing that it does, then something is wrong, quite
possibly with the test kit.

But, in any case, it definitely looks like the CO2 level is dropping
during the day. And that isn't a good thing, since the plants growth
will be slowed, increasing the chances for algae to grow.


Chuck Gadd
http://www.csd.net/~cgadd/aqua