I've still got my Tunze osmolator in the closet. Just using an aqualifter right now. Too lazy to set up the ozmolator. I've had one on my 125g in SL and bought one when I moved here, but I haven't bothered to set it up. The only issue with the osmolator is that it shouldn't be plugged into a controller and the pumps do go out periodically (especially if you run them dry).