I have that one, that thing is set and forget. You can control both the bubble size(adjust prssure) as well as bubble count. They have a 3yr full warranty, which I have had to use. I blew out the diaphram(didn't back off the regulator fully) when I went to a larger bottle and was expecting a hassle when I told them what happened, but was pleasently surprised. They asked me if I saw any fine print or disclaimer's anywhere, I said no and they said exactly....send it in....gotta love that. :lol: