Roy, After taking Erik some SMS and getting to visit with him and look at his tanks, I also went home and treated the 100 gal tank that I had a bad breakout in. The results were astounding!! I have been applying weekly doses at a reduced rate and have not seen any return of the dreaded BBA. Good luck. Larry Litten Wilbur-Ellis Co. (206)310-5530 llitten@wecon.com -----Original Message----- From: gsas-member-bounces@thekrib.com [mailto:gsas-member-bounces@thekrib.com] On Behalf Of Seattle_Aquarist Sent: Saturday, April 19, 2008 10:32 PM To: gsas-member@thekrib.com Subject: Re: [GSAS-Member] ATTN: Erik Olson - Please Relate Luis Navarro'sExcel Treatment Procedure for Algae Wow Erik! Sorry to hear the flu/cold thing has hit you and your family, I had a couple of days of that this week too but I'm doing better. What an excellent presentation/explanation; I was hoping for a short note and you sent a novel!! I can see the vast improvement from the initial photo to the treatment completion which confirms the effectiveness of the procedure in reducing algae. I must admit it is much better than I would have expected. I've been doing a lot of reading on the web (mostly APC) and your results are confirmed by others who have tried this procedure. I don't know, but I think that the glutaraldehyde in Excel that provides the algaecide properties, works only as long as it is used. The active ingredient (glutaraldehyde) apparently breaks down after 24 hours or less into carbon that the plants can utilize for growth. If the conditions that originally allowed the algae to flourish are not corrected, or if treatment with Excel (glutaraldehyde) are not continued (possibly at a lower maintenance dosage?) then the algae can return. I think I will pick up a bottle of Excel and give it a try. I will be happy to report back results if others express interest. Thanks again for the excellent report, if you do this well when you are ill I can't imagine what it would have been like if you had been feeling good! Take care of yourself and your family. Roy _______________________________________________ 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