I am worried about the amount of weight on the bottom part of my tank. I do have about an inch of sand in my 50 gallon long tank. I am wanting to add a little yard statue in there. I attached that picture. It's a broken Angel and it weighs about 17 pounds. I wouldn't have any other rock around it in my tank. Has anyone else done this before? Because I'm worried about that amount of weight in a small area.