billm January 11, 2009 Share January 11, 2009 while moving my liverock around I found something growing on the side and bottom. does anyone know what this is? the stems are brittle. anyhelp is appreciated. Thanks Bills wife Link to comment Share on other sites More sharing options...
lanman January 14, 2009 Share January 14, 2009 Feather dusters... little filter feeders. Not harmful - in fact slightly helpful at taking nutrients out of the water. bob Link to comment Share on other sites More sharing options...
dcreefer January 14, 2009 Share January 14, 2009 I have seen those before! I use to get sponge like things growing under my rocks that resembled some type of leather Coral... and little pipe worms... If it isn't invading my tank and eating the stuff I paid for I usually just let it grow! Link to comment Share on other sites More sharing options...
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