Just make sure your sand is cleaned and ready to go before you start. You can use whatever you want to get the gravel out - your hands, a net, a scooper or whatever, lol, just get it out,lol. When you go to add the sand, the best thing (and the easiest way IMO) is to use a manual siphon to pour the sand down. Just remove the tubing, and use a regular funnel to pour sand into the tube. Use the angled "mouth" of the siphon to your advantage, and use it to postition the sand as it pours out. I do this all the time, and it is clean, fast, and super easy. Have fun! LOL
--EMI