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CF lights and ph probe interference

Hello All,

I have lurked a long long time to finally ask a non-plant related question,
but here it goes:

I cannot use my PinPoint pH meter at the same time my CF lights are on - the
readings jump all over the place, sometimes into negative numbers!  I
understand it is interference from the ballast (mounted in the hood in
between the lights), but I am at a loss as to how to avoid the problem.   I
have even considered getting a small wet/dry to place the pH probe in the
sump!  Of course, this is only a 30G aquarium (X-tall), and a wet dry is
likely overkill.

Has anyone solved this problem, any solutions that do not require
dismantling the hood?


John Stark