I got one of these big beast today and I am wondering if anyone else has one or has dealt with them in the past? For some reason the way it is made it's not sucking O2 down into the tank? I need some advice. 
The way they made it the O2 line runs in front of where the water returns to the tank. It's pushing big time but you can see the water going up and down in the tube right were it should be going into the tank. I may just need to go buy an air pump.crowconor;2417360; said:do you have the hose connected to them i think theres a way to hook a aerator up to them if not just let it run.. this happended with one of my other powerheads it needs to build up or something good luck
conor
Bderick67;2417905; said:Hey Mike the powerhead needs to be fairly close to the water line for these to work. If ya want to use it deep in the tank just hook a cheap air pump to it.
Guapote;2418729; said:What size tank is it? I haven't seen a 901 but I use 801's on my 150's.
Let us know how it works out.