Hello!! Well I seem to have finally gotten my green pea soup pond to finally clear up. Know that I can see my fish, I have noticed I have a build up of algae on my pond walls, so I was wondering about small pond vaccums cleaners and what you guys think about them? I don't want to remove all but I wanna clean it up. I'm kind of thinking maybe a battery operated one for under $50. Any suggestions or strong feelings about one or any kind of cleaner?