I can vouch that growing HC emersed and then submerging it works well. I did it on a 10gal a while ago and I was impressed with the results. If I can get my HC growing again I will try to bring some. I've had some difficulties with the tank that has it lately. -Bryan _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member