Salty I had heard the same thing about DI making monitors go screwy, I was afraid of that. I do add makeup water to the sump. Mayeb when the frsh DI passed over the end it messed up the calibration. How do I avoid this in the future if that turns out to be the problem? Turn it off for an hour while adding water? I pulled the unit from the sump, wiped it clean with a toothbrush (not mine, hehe) and tried other areas of the tank. When pulled from the water it ranged out the numbers, the second it was back in the tank, 9.02.

Ok ok so most think it is the montior and not the water.


But just what if it was my water? What could cause it to rise that high? What does it mean if it is that high? I've heard that PH over 8.0 causes ammonia to become lethal. My corals all look excellent, fish look good. Only my wrasse is acting weird, but that is also his personality could be a fluke with that guy.