Raising pH without changing dKh???

[Zzippper]

What is the best way to raise pH without changing the dKh?

Typically, when the pH of my tank drops - the dKh does too. I solve both by using Reef Buffer from Seachem.

Trouble is... I've recently added a sulfur denitrator (which works awesome, by the way) and the denitrator effluent has a pH of 7.3. For some reason, it is lowering the tanks overall pH but not effecting the dkH.

I've added more buffer - and it does raise the pH - but it also raises the dkH. I don't want to add anymore buffer because the dKh has gotten too high (currently 16).

Advise? Anyone?

Thanks!

Z

[xenon]

Open your windows. CO2 buildup in the house does effect ph.

Do you have a good ph probe?

My ph stops at about 8.15 if I dont open my windows. I can get it up to 8.35 with windows open so I make it a habbit to do this daily.