Keep your fish's habitat sufficiently aerated with the Marine Metal Bubble Box Aquarium Aerator Pump. With a durable, water-resistant housing and stainless steel mounting clip, installation is quick and easy. The silicone tubing is flexible and features an air stone to keep it weighted and beneath the water's surface. With durable battery contacts, this Bubble Box air pump runs for up to 44 hours on a full charge. It makes a reliable back-up for an aquarium's main pump.