Cubuffs, H and S, Aerofoamer, Myreefcreations, precision marine, euro reef, aqua C, they're all very good. Some better than others, but all are good performers. Depends on what you're looking for. If you're going to run ozone and a calcium reactor, perhaps look at the Aqua C, they're very user friendly and have many options and are priced reasonably. Myreefcreations dot com uses beckett nozzles and are custom built if need be and produce a ton of bubbles as wel.