[sgarron]

I see this is a common problem, low ph that is. I've read all the threads and articles I could find but, I still have a ph of 7.8. It has actually been dropping to 7.65 at night. I recalibrated my reefkeeper and double checked it and it is correct.

My calcium is at 350, mag at 1300, dkh at 10. trates, trites, ammonia, all zero. I plan on straightening out my calcium issues this weekend.

I figured it was due to excess co2 in the house in the winter so I ran pvc pipe from the skimmer venturi, inside the wall, behind the crown moulding and out the side of the house. This was over a week ago and my ph is unchanged. I was able to bring it up temporarilly with baked baking soda but now that my dkh is 10, I can't do that any more. All my top off water runs through a kalk reactor.

Everything in the tank seems to be doing quite well, but I'm still concerned. I want to get to 8.2 or 8.3.

HELP!!! I'm stumped.