PH probes

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Aquarium Advice Activist
Jan 11, 2005
Ballinafad Ont. Canada
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.
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.
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