Penn Plax Action Half Shipwreck Aquarium Ornament Real motion air-driven ornaments provide entertaining action while aerating your tank. Aquarium ornament features one half of a shipwreck, that rocks back and forth on the aquarium&rsquo;s floor. Ship attaches to air pump enabling movement providing both visual appeal as well as aerating your tank in a unique, fun way. Air pump, tubing and gang valve not included. Made of safe durable resin, this fish tank ornament is hand painted with detail and is safe for use in both freshwater and saltwater aquariums. Requires air pump &amp; 3/16&quot; tubing (not included). Pressure control valve recommended. Ornament is a part of the Penn Plax line of Action-Air Aquarium Ornaments. Collect them all!