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Algae, bacteria hogged oxygen after ancient mass extinction, slowed ma

Harlequinmania

By Harlequinmania,
in General Reefkeeping_

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Harlequinmania

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After the biggest mass extinction in Earth's history -- 250 million years ago -- algae and bacteria in the ocean rebounded so fast that they consumed virtually all the oxygen in the sea, slowing the recovery of the rest of marine animals for several million years.

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1000 Gallon Tank in the Hole 

http://www.sgreefclub.com/forum/topic/120957-1000-gallon-3d-hole-in-the-wall/ 

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