How does everyone manage 25% water changes on tanks 75g and over? The pumping out of the water is no problem as gravity is on your side. When putting water back in, I've tried a small submersible pump but after about 4g it gives up and the water comes back out. I've got a python but how can I get that amount of clean water above the level of the tank water. Am I being thick or does everyone resort to the jug method? Any secrets out there that you're willing to share about big water changes?