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![]() so i have some white sponges growing in my overflow on the pipe and glass, they all are tiny 1mm wide 2mm high and all have holes like in this picture http://www.livingreefs.com/attachmen...e-dsc03256.jpg
the second one is on a rock and is slightly yellow http://www.chucksaddiction.com/sponge4.jpg any idea what they are? and if there good or bad?? |