PVC pipes is just run around the store. you have to drill small holes for valves that they sell. The regular airlines connect to them for the sponge filters. Just get a big enough air pump and get a back up pump too. I did this in my fish room and it works great. I am also planning on opening a fish store in the future. Planning on keeping and breeding the bread and butters too. Just trying to do that before I would open and get myself a custermer base though aquabid, ebay, and craigslist before I would open my doors.