I think I paid $20 per bag (around the size of a bag of fancy coffee), and bought several bags online at a pond site. It feels like ceramic and doesn't change water hardness, but I have seen reports of people experiencing raises in copper levels when first using new media-- obviously this isn't the best thing ever for your inverts (if you have them), so I'd add with caution if you're keeping sensitive critters. I did kill a whole tank full of amano shrimp when I first set mine up, but I never tested for copper, so I'm unsure if that was the root cause. Cliff > >> >> SO, where do you GET Alphagrog? And is it a 50lb sack for a small >> fortune, or >> something more reasonable? Inquiring (and sometimes lazy about timely >> cleaning of >> their tanks) minds want to know... ;) >> >> CC >> >> > > > > _______________________________________________ > 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