Quote Originally Posted by hobogato
what are you using to test it? if a probe, maybe the calibration is off, if a chemical test kit, maybe try to confirm with another - make sure it really is high before you do anything to the tank. are you dosing kalkwasser? that can cause your pH to rise, but make your alkalinity low. you may want to test your alkalinity too.
Hi, I'm using two types of testing tools. one is the Pinpoint probe and the other one is the Hanna PH stick. I dont use any test kits such as salifert..etc. I think they're inaccurate.

I dont dose any kalkwasser as well.

Just installed this CR-140 reactor two days ago and my Ph gone haywire. Now i checked it's around 8.8.

But the calcium is still around 416-426

So what should I do??

Thank you