It takes time to break in an ORP probe in seawater. Check back in a week or two. Did you check its "calibration" ? A well run reef tank will run near 400 without ozone. Most run in the lower 300's. Fresh salt mix or a new tank will run in the mid 200's.
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Seawater Chemistry, Geology, ID Marine Life, Collecting Science Books, Explosives Technology, Audiophile
An explosion can be defined as a loud noise, accompanied by the sudden going away of things, from a place where they use to be.
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