Filtering water, farming kelp

[Ranjib]

Context: http://www.npr.org/sections/thesalt...farmers-seaweed-becomes-a-new-crop-in-america

Just watched this in today's VICE news. Large scale kelp farming, that can reduce the ocean nitrate/phosphate while providing some food as well as act as artificial reefs. Pretty cool and staggering similarity with reefing approach to control nitrate/phosphate via algae scrubber or reactors. Thought I'll share here :-)