Hi Shango, When I bought the plants at the auction and first tried to plant them in the gravel, they kept floating up to the surface. After getting a pair of tweezers I was able to get them down deep enough into the gravel that they were not easily uprooted. Although a couple of the HC and Glossostigma have floated to the surface and had to be replanted, I blame it on the dozen Corys I also bought at the auction. I feed them wafers and they really root around the plants when I feed them. Hope this helps. Roy _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member