BubbleMac Aeration Products AquaVescence Aquarium Aeration System: Manufactured by, makers of The Forever Bubble Stone. -- This Bubblemac system includes a 3 Watt DANNER Air Pump, 8 feet of air line and a Self-Weighted, High-Quality 100% Glass-Bonded Silica Air Diffuser. This Aeration System comes completely assembled. Simply place the diffuser in tthe desired location within your aquarium, plug in the pump, and "Watch The Bubbles"...... The High-Quality Silica Air Diffuser included with this system measures 1" x 1" x 1". These diffusers are renouned for their quality performance, extremely low maintenance, and impressive service life. This aeration system is designed for fresh or salt water and will adequately aerate aquariums from 10 gallons to 250 gallons in size. Bubblemac Air Diffusers and recognized worldwide as the "Standard of the Industry" in college labs, fish hatcheries and wastewater treatment facilities.