I bought the Marina Multi-Vac Battery Gravel Cleaner, opened it up and attempted to figure it out but I'm having trouble. I put it together just like the package depicts (there were no instructions!), popped some batteries in and tried to use it. It does absolutely nothing. It makes a whirring noise but doesn't even suck up water. I just want to use it to clean my gravel as I have a siphon for water changes but want to do more frequent gravel cleaning. My question is, does anyone know how to use this gravel cleaner? Am I doing something wrong? :helpsmilie: It didn't cost me very much... should I just get a new one that costs a bit more? I was looking at the Eheim brand ones, they look pretty good. Would you recommend these?