No, I will not be able to test this for a very long time. I am in the process of moving down to Texas from Kansas City, and won't have a tank to test it out in. I have seen pictures of this before on someone else's tank and a couple of folks around here (locally) say it work. So without testing it, I take their words.....On paper, the concept makes sense, instead of having a hole drilled, the valve is in place and you have manual control of how much air comes in.