Review on JW Pet AccuAir Gang Valve - 4-Way: Optimize Your Aquarium's Aeration Control by Regina Poe

Complete nonsense. I set it up a few weeks ago, hooked up an air pump to it, and then used the two wide-open outlets. He went on vacation out of town, when he came back the air wasn't bubbling. Go and have a look and think my pump is dead, no it's just junk. I don't know how, but both sections that the air hose slides over looked like they were corroded and torn off. A bit strange because I didn't use ozone. I think it's just very poorly made and it's not worth spending money on. Then it broke, the rear clip for attaching it to the tank broke off due to poor packaging.