I am very bad a gravel cleaning- I tend to loose a LOT of water so I purcased the Penn PLax battery vac because it just sucks the debris into a filter bag and you keep your water. Well I am not an engineer but I am 99% sure I have this thing together correctly. The batteries work, the impeller is spinning and is not clogged, all the tubes are connected as tightly as I can get them without breaking the plastic... Other than what was printed on the box there were no instructions. I am thinking (you knew your smelled something burning) that I am missing some very basic step that they assume everyone knows. It has a waterline marker so I know how high to hold it. Do I submerge it completely before starting it? Anyone have success with this? Thanks for your guidance!