Features: * Creative suspending rock decoration for fish tank, Aquarium. * Made of safe and enviromental resin material, suitable for fish tank use. * Light weight, it can float on water if there is no line to tie. * You can string it on a sucking disc to fix on fish tank bottom, the stone will look like suspending. * This rock is with many tiny holes, it can help to absorb bad bacteria and harmful heavy metal. * We provide a choice with moss, the moss is also artificial materila, not harmful, but more vivid.