YOur pH should start to go down. YOu need to know the water hardness and
measure the pH and make sure the co2 level (computed from the two values)
does not get too high. Use Chuck Gadd's wonderful calculator:
http://www.csd.net/~cgadd/aqua/art_plant_co2chart.htm

Lots more info on co2 injection, mostly about pressurized co2 systems but a
few items on DIY co2.
http://members.cox.net/tulsaalstons/...Pressure%20CO2


--
Bob Alston

bobalston9 AT aol DOT com
"Martin Moran" wrote in message
...
Hi there,

I've been kind of lurking here for a couple of weeks, but I now have a
question.

With some help from the greatest LFS that I've ever known, I put
together a DIY CO2 unit today. It's the most basic one, a 2 litre pop
bottle, a checkvalve, some airline tubing, a rubber stopper, and an
airstone.

I've had the solution ready for about 1.5 hours, and hooked up to the
tank for about 1.25 hours. I'm already seeing fizzing through the
wooden airstone, so it seems to be working REALLY well!

My only remaining question is - what should I be looking for in
changes for water chemistry?

My current water is:

pH 7.8
No2 0.1
No3 0.0
kH 100
GH 200


Thanks!



--
Martin Moran ommoran at telusplanet dot net
Beaumont, Alberta remove "no.spam" on replies

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