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04/04/2009, 07:39 PM
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Registered Member
Join Date: Sep 2004
Location: Orlando, Florida
Posts: 625
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Typical ORP Swing
Those monitoring ORP, how much does the level swing during the day. Mine swings about 40 and it appears to be the inverse of the PH, whereas when the PH increases during the day, the ORP drops. Not sure if there is a chemical relationship or it is merely an increase in demand for oxygen by respiration of corals and fish during the daylight hours.
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