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Unread 02/19/2020, 08:56 PM   #3
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Join Date: Feb 2007
Location: Santa Monica, California, USA
Posts: 2,511
Little known info: Bubble algae concentrate nutrients into the bubble, and thus can survive for a while with no nutrients in the water at all. And bryopsis uses actual roots that extract nutrients out of the rock, also, when there are no nutrients in the water.

Inventor of the easy-to-DIY upflow scrubber, and also the waterfall scrubber that everyone loves to build:
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