Hi all, after a bit of advice. I currently use a small plastic syphon tube for cleaning my substrate, but I am not to happy with it, doesn't seem to be much suction really and the exit from the larger tube gets clogged easily. I have seen some battery powered ones on fleabay and just wondered if these would be better. Does anyone have any experience with one of these battery syphons? or what do you use and are happy with. Thanks in advance. Chris.