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Re: Spirogyra

> It's green.  It's filamentous, it does not attach to 
> anything, but grows
> in mats.  It floats if you give it enough light and turns 
> yellow if you
> give it too much.  It's common in stock ponds in my area.  It's
> definitely not slimy, actually a rather rough texture, and brittle.  I
> can pull scads of it out of the (lighted) sump in my 55g.
> Ghost shrimp and Krib babies eat it.
> Tell me what it is.

Spirogyra.  You were right the first time.