Hi Cliff, I've heard this term before and didn't research it, so could you, or someone, be so kind as to explain exactly what the heck it means? Thanks, Clay On Saturday, February 28, 2009, at 12:00 PM, gsas-member-request@thekrib.com wrote: > I just fill them full of alfagrog and wash them out > every year or so when I do my water changes (if I remember). _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member