I use 2 32 gallon rubbermaid brute trash cans, a mag 7 with a hose and fitting and a 1" ID syphon/drain hose. I drain water from the main display into one of the trash cans while I pump the new water into the sump from the other trash can. Of course I've brought the new water to the temp and salinity of the tank and let it mix, using the mag 7, for at least 12 hours before doing the water change. It takes about 8-10 minutes to do a water change. Both Brute containers are on wheeled dollies so moving them is easy and I use the mag 7 to drain the old water out of the container and into the sink.