I have the same problem bro...............125 gal in basement....= pita.......& very long annoying w/c.............Python suction is close to nothing pumping up a full flight of stairs and a waste of water............what I did (almost said eff it and quit)..............was buy a flow tech 1/6th hp utility pump (home depot, $70...you can go bigger if you are Monster!!!) and I now pump the water either directly from the tank to the toilet............pump attached to the python hose ...yes the toilet or if it's gravel vac week i will siphon the water into a 50 gal rubbermaid then pump from there............a lot quicker and less frustrating...GET A UTILITY PUMP..........if your big tank is in the basement!!!!!!!