Hi there, a really basic question which I am most embarassed about. My plants keep escaping especially the one planted in the sand. The two planted in the gravel do hang on a bit better. I have seen in Pets at Home they have wee terracotta weights to house the plants and keep them submerged, but they don't stock them for general public. I am looking for something decorative like that or an idea of what I can attach them to keep them in place. I have looked at some of the pinned topics and someone was using blue plastic with holes in. Any suggestions? Thanx Xanthe