Sears sells a pump that most people use for pulling water out of the lake for lawn sprinker systems. But it might pump to much for what you are needing. They cost about $120 and are self priming. Im sure lowes, home depot, etc. sell them too. They are 120v. for just cleaning fish a boat bilge pump may work. I you don't get a self priming pump you will need to put a spring loaded check valve so you won't lose prime on the pump