Ok. The Caulerpa is gone.
But what is this stuff? 
It is in a thick clump, was green at first and has turned somewhat brownish.
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TomV
10g Nano Re-established 3/06: 96W PC Quad, Seaclone 100 modded, Hagen 301 PH'd, FOWLR for now.
55g 3-15-05: 130w PC lights, 250w Ebo Jager htr., 200w htr., Aquaclear 500 DIY Fuge. Softies Tank |