I used my utility sink, which made it a lot easier on the back, and I wasn't too worried about getting too much sand down the drain because it was only the loose floaty particles that were being rinsed out. I've cleaned sand a few times and the method I found works best is to use a BIG bowl and fill it 2/3 with sand and just let the water pour into the bowl and overflow the sides as you stir it with a big cooking spoon. You will be able to see when the water turns clear, at which point you tip the bowl to drain out most of the water, and dump the clean sand (and a little water) into a 5 gallon bucket. Then repeat until all the sand is clean. When you are ready to add the sand to your tank, most of the extra water that went into the 5 gallon container is at the very bottom, so the sand at the top will only be damp. When you've removed most of the sand and get to the wet bottom of the bucket, you can simply tip the bucket slightly to drain most of the remaining water out, our use a colander if you want to try and get every last grain of sand.