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#11
02-11-2012, 09:08 PM
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You were half right. At night the system reverses and oxygen is used up which can lead to the die off of phytoplankton and the consumption of even more oxygen as the algae decays.
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"We shall dive down through black abysses... and in that lair of the Deep Ones we shall dwell amidst wonder and glory forever." - H.P. Lovecraft Old 120gal Tank Journal New 225gal Tank Journal May 2010 TOTM The 10th Annual Prince George Reef Tank Tour 
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