Aquarium Aeration System; Featuring Two Bubble-Bubba Micro-Bubble diffusers Model #BBWP by: Bubblemac This high-quality Bubblemac Aquarium Aeration System includes a 3.5 watt Danner Adjustable Output Air Pump {two air outlets}; two 8 foot coils of clear air line tubing; and two world renouned, high-quality Bubblemac "Bubble-Bubba" micro-bubble air diffusers. No assembly necessary! Simply place the two air diffusers in the desired location within your tank, plug it in and "watch the bubbles"...... The "Bubble-Bubba" diffusers are constructed of 100% glass-bonded fine pore silica and have become commonly known as "Americas Favorite Aquarium Stone" with thousands sold globally. These high-quality air diffusers are self-weighted... they stay put! This system is designed to provide adequate dissolved oxygen for aquariums from 20 gallons to 500 gallons. Great for fresh or salt water applications.