High Simulation Stone Texture, The Floating Stones Are Changing Your Aquarium Into A Landscape Scenery. These Aquarium Stones Decorations Provide Visual Interest For You And Your Fish. Floating rocks made of advanced resin have a high resistance to acid, corrosion and are non polluting, non radioactive, etc. Suitable for both salt and fresh water.Absolutely safe for fish, they will not die, rot or cause algae problems. Our floating rock is attached with a wire and two suction cups, just stick it to the bottom of the tank full of water, the stone will float easily at any place by adjusting the length of the wire.