Yes, the sand was moving around so much that I decided to take it out. I didn't like the look without the sand so I added 2 or 3X the original amount and it seems to be working out now. I like the sand because it gives a tank a more natural look, and it helps reflect the light back up. You can also see the green birdsnest is gone now. It was getting too much flow and I didn't have anywhere else to put it in the tank.