So far it has only been running about 2 weeks, dialed in nicely and pulling out wet tea green/yellow skimmate. But I am impressed with the amount of oxygen bubbles making contact with my water column. I have cover tops not allowing evaporation to occur as much. So I needed this badly for the oxy intake via the skimmer. Hopefully that makes sense.I tried it on my last tank. Aio 8g or so. Eventually water stopped going into the body of the skimmer and it ended up just being a big air pocket gap.
Hope it works better for you. Keep it clean.
D