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#2
01-12-2013, 04:37 PM
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IMO, unless you had a party with 20+ people over and kept all the windows and doors closed (not sure how they all left
 ) then no, it's not going to be low O2. This assumes of course that there is some water movement in the tank and there isn't a film of anything across the top of the water.
__________________
Brad 
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