Join Date: Apr 2003
Location: Mid-Hudson Valley, New York
My water out of the tap is pH 7.0, KH 1 or less, GH 2. I'm setting up my first planted tank, low light, but wanted the option to inject CO2, so went with Onyx sand over Flourite. That raised the values to KH 4 and GH 5. Only thing is, I've heard after a time the effect from the Onyx lessens. It would be nice if it had enough stability to prevent me from having to dose regularly for hardness. We'll see what happens.