It's glutaraldehyde, a disinfectant. It's quite similar to the active ingredient in Excel, which many people in the group use for algae control. At this point I can't say for sure it's killing my algae, but the vascular plants seem to like it. (as a carbon source) Cliff > Does anyone have any experiences to share from using Glut on hair algae? > Cliff mentioned it but I have never heard of the stuff. I cannot even > find > it online. > > Thanks in advance. > > Shango > _______________________________________________ > GSAS-Member mailing list > GSAS-Member@thekrib.com > http://lists.thekrib.com/mailman/listinfo/gsas-member > _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member