Thanks for the info,

N02 is zero,
I did a water change and it droped down to 8.2 so I will keep checking
the PH but I think it was just do for a water change. As Feb is a
short month I went 6 weeks for a change.

THKS/Rick

MWill wrote:
A drop or rise in ph does happen, monitor it . You said your No2 is
.10
if a reef tank it should be at 0 ppm along with No3 which you didn't
mention what that was. Have these readings chanced recently? or are
you do for a water change? If it doesn't come down or is going up
it's time to do a water change then get a good reef buffer to
stablize
the ph to about 8.3 for a reef.

Seachrem's Reef Buffer is what I use and I have been able to
maintain a ph of 8.3 there are other brands out there as well, kent
marine makes one and are easily found in LFS or online catalogs.

Mark