If you are doing 5 gallons or less (like I do for my nano), I just use one hose. I siphon waste water to one bucket and when it is filled, I put my finger on both ends of the hose, put one end into my sump and the other in the fresh salt water bucket, which I have elevated on a salt bucket and let it siphon back into the sump. I have small clamps on both ends, so it doesn't move while siphoning. Easy as it gets. No splashing, no pumps, etc. Just gravity.