On Wed, 28 Jan 2004 12:44:06 +0200, "Happy'Cam'per" wrote:

Hi there

It depends on how you are going to be diffusing it into the water. For
instance, some people inject the co2 using a bell (upside down container)
that collects the co2 and it then dissolves into the water slowly. Other
folks inject it directly into their internal canister filters, this is a
very effective method BTW. If you do a search on google for Tom Barr's co2
diffuser this is probably the most effective way of dissolving c02 into the
water column.

Ideally you are trying to reach a target of about 20-25ppm c02. You can work
this out by getting yourself a KH and PH test kit. Download the handy co2
chart from Chuck Gadd's website and you're on your way. Take the readings
from the kh and ph kits and then use your chart to figure out what sort of
co2 levels you have.

To give an example. My kh is 6. My ph is about 6.9 after adding co2, if I
use the co2 chart it tells that I've got a reading of about 20ppm co2. I
personally inject the co2 directly into my internal canister filter, I have
a bubble rate of about 1 bubble per 2 seconds (30 bubbles a minute). My ph
out of the tap is about 8.3. Keeping the surface agitation down to a minimum
also helps to "hold" the co2 in the water and not let it escape into the
atmosphere (turn off your airstones).

If anything is unclear just ask and I'll try to elaborate a bit more if my
explanation is still fuzzy


I will be using an Aqua Medic circular reactor.