On 16 Nov 2002 16:43:07 GMT, oSpam (LeighMo) wrote:

Personally, I don't like adding baking soda to the tank. IME, it's hard to
keep the pH stable that way. I prefer calcium carbonate,

There is no difference between using baking soda or calcium carbonate.
Both will increase the KH.

Using Calcium carbonate will raise the GH and KH, while using baking
soda will raise only the KH. Depends on what your water requires.



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