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PostPosted: May 12th, '17, 11:36 
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This may be of interest to some: Kelp biochar: a potential plant substrate for freshwater aquaponics

It seems that kelp biochar works for floating raft systems but absorbs too much water for use as GB media.

In case you're wondering or have forgotten, biochar is "... a stable form of carbon produced by the pyrolysis at high temperatures (400-500°C) of forest – or agriculture-derived biomass residues in a low – or no-oxygen environment. Biochars are stable in wet environments, provide pH stability and their long-term carbon sequestration can potentially reduce the impacts of climate change."

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PostPosted: May 26th, '17, 07:17 
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IMO its all a selling technique. Take a ton of Kelp from the sea, wash all the salts from it, dry it so that you can char it - How much weight do you have left?

Then after charring the weight even gets way lower.


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PostPosted: May 26th, '17, 07:45 
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The link doesn't work for me.

If they are removing the kelp from its native habitat, that may kill that habitat. I hope they are doing this in a sustainable way.

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PostPosted: May 26th, '17, 09:10 
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haha kinda hard on the ocean to char it in place

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