Saim Mountain Aquarium Ornament - Rock Cave Stone HIDE Bonsai Decoration Decor Comes with a bag of sand and airline tubing to create quick sand scenery.(requires air pump,Not Included,usually use a 8W power air pump.If the water level is above 50cm,requires air pump with 10-15W power) Offers the natural environment feeling,change your aquarium into a beautiful scenery. Made from non-toxic resin material and makes an exciting ornament in any aquarium. It is vividly and colorful detailed to add lively and natural life to your tank. Great to decorate your aquarium all the time with minimum responsibility and maintenance.