I cannot tell too much from the image, appears to be fruiting, what is it attached too? Glass? It's not likely an alga. I'd need a closer pic. Regards, Tom Barr subscribe at BarrReport_com Get connected www.BarrReport.com Get the information _______________________________________________ Aquatic-Plants mailing list Aquatic-Plants at actwin_com http://www.actwin.com/mailman/listinfo/aquatic-plants