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Swimming Decorator crab

I just looked at the tank (behind me) and this decorator crab is swimming at the surface. No he is not dead. How cool is that?
He can do that because he decorated himself with bubble algae, which is filled with air.
I wonder if he knows thats why he is floating. I had to push him down to grab on to a rock.
I took this from the surface, down

Here he is where he is supposed to be.

  1. Paul B's Avatar

    Denitrifying coil

    by
    Paul B
    , 06-22-2012 at 09:52 AM (Swimming Decorator crab)
    I built a few of these over the years and was not crazy about any of the designs but this one I made last month works 100%.
    My reef now has a nitrate reading of 40 and I figured it would be a good time todesign a new Denitrification device but I had no idea it would work so good and so fast. They usually take a couple of months to fully work but I had it running for a month and I just tested it. Water going in has a nitrate reading of 40 and with just one pass through the device which takes ...
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