PH probes

[Fireworks]

Does anyone here use a digital ph probe and find it accurate? The reason I ask is the probe on my Reef Keeper 2 controller always reads a fair bit lower (7.75) where a normal test kit reads 8.2. I calibrate the probe every month and it still reads low. Which test should I consider more accurate?
Thanks Jamie.

[melosu58]

I`m moving this to General hardware and equipment discussion. That way the FW people can see it and answer too. I know some freshies that have digital PH readers also.

[sw-addict]

I recently bought a reef keeper 2 also and after finding a forum by digital aquatics it is a comon problem trust the test. heres a link to the forum Reef Central Online Community - Digital Aquatics