SIMPLY THE BEST... at very good prices. I bought the ALL Pond Solutions quad AIR PUMP. I couldn't and still can't believe how quiet it is. It comes with the air piping and air stones. Really powerful yet so quiet as are their external Canister Filters! Over the 50 years of fish keeping this has got to be the quietest and most cost effective. I had a problem with the Air Pump, I contacted All Pond Solutions and they promptly replied the very same day. Charlotte was so understanding and nothing was to much trouble. A service that is lacking in so many companies, and I'm proud to say that they are a British Company. My Air Pump was promptly replaced at no cost to myself and no problems since. I have bought other products from All Pond Solutions and been really satisfied at an unbeatable price. Their external Canister Filters are so quiet, I sit at the side of my tank and can't hear either the Canister Filter or the Air Pump! Give them a try I can promise that you won't be disappointed and find yourself replacing your Pond/Aquarium equipment from ALL POND SOLUTIONS, 5 STAR CUSTOMER CARE... 5 STAR PRODUCTS... 5 STAR SERVICES & 5 STAR PRICES... need I say more!