this is what i'm looking for . and was wondering if anyone could help me with advice. i want to get the biggest cooler i can find. one with handels and wheels maybe. and i want to find a battery powerd water pump. or basically somthing to circulate the water as much as i perfer. plus of course airrate it. i have aquarium power heads and what not . and i know i can find regular water pumps. but i need somthing that can run off of the smallest battery possible . do they make pumps what will not air the water , but pump it . that even run on batteries. and if not how could i convert a regular water pump .into runnng off some type of battery. i would also like a way to add filter media to my pump. make it a full functional filter . can anyone hlep me with my idea.