On Mon, 28 Jan 2002, David Sanchez wrote: > Why are yoiu using a CO2 system if you have water with > oKH to begin with Colin? The lower the KH the higer > the CO2 level. This isn't true. CO2 level and KH (Carbonate Contents) are independent of each other, but ratio of the two together help determine pH of the water. With 0 KH, CO2 injection will not be as stable as with a few degrees -- without a small bit of the conjugate buffer, the pH will fluctuate in response to very minute changes in CO2. I think this is what Colin is saying below: > --- Colin Gorton <mr_apisto@graffiti.net> wrote: > > I don't want to use pure RO as I'm adding CO2 and > > want to be able to maintain a constant pH, which > > I've found to be easier with a small amount of > > hardness. - Erik -- Erik Olson erik at thekrib dot com ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com.