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#1
05-16-2006, 06:15 PM
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Where is your ORP probe located? Only thing I can think of is that your ozonizer is pumping in ozone into your tank, but the ORP is "spread around" the rest of your tank until quite a while, so by the time your ORP probe detects the increased ORP, the area your ozone is getting injected into is much higher than your desired level, and when this "spreads out" to your probe, you have a much higher ORP than desired when the unit kicks out.
If this makes any sense, then you could try relocating your ORP probe closer to the output of your canister filter lets say, and you might not get as big of swings. Also, if you know someone else with an ORP meter, borrow their unit to verify the readings against yours, maybe your controller/probe is wonky. 
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#2
05-17-2006, 03:00 AM
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There is a series of articles in the last three months in Reefkeeping Magazine on ReefCentral that might help you with some answers. I kind of glossed through them, since I don't have ozone on my tank. I recall that the reaction time of the meters was discussed in one of the articles.
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I retired and got a fixed income but it's broke. Ed _______________________________________ 50 gallon FOWLR, 10 gallon sump. 130 gallon reef, 20 gallon sump, 10 gallon refugium. 10 gallon quarantine. 60 gallon winter tank for pond fish. 300 gallon pond with waterfall.
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#3
05-17-2006, 06:11 AM
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clean the probe
Jason
clean the probe with a toothbrush. If i don't clean mine, it climbs and climbs and climbs. I have to clean mine every 2-3 days to keep the readings accurate.
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____________ If people don't die, it wouldn't make living important. And why do we fall? So we can learn to pick ourselves up.
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