Thank you Travis, I was just PMing somebody about a suggetion like that. This overflow doesn't have the u-tube, it's the CPR style overflow box. But same principle, I understand they don't hold a syphon very well and will have to have a pump sucking all the air out of the "c" section. I have never had a problem with my U-tube cutting off the syphon at all, and I turn the return on and off like three times a day for feeding the display. But this one was only 29.99 so I figured what the hay, I'll give it a try.