I am looking for used external pump the ones that are like pool pumps except for aquarium use and more energy efficient. I am looking for any pump stronger than 700 gph to run my sand filter. I am also looking for a powerful airpump. Specifically looking for a used pond master ap 100 but if you have something similar around 9000 cu in ill be interested in that as well. I will pay for shipping to connecticut. Pm me and let me know