Yes, I have and it works great. The beard algae turns purple and dies. Susan -----Original Message----- From: gsas-member-bounces@thekrib.com [mailto:gsas-member-bounces@thekrib.com] On Behalf Of Dianna Phillips Sent: Monday, October 06, 2008 2:37 PM To: Greater Seattle Aquarium Society member chat Subject: [GSAS-Member] Beard algae and Excel? I have some beard algae that's managed to attach itself to the caulking in my tank. Has anyone ever tried an Excel treatment on beard algae? Any luck with that? Dianna _______________________________________________ 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