so what your saying is that the rays do enough with stirring it around that i dont have to worry about syphoning crap off the bottom of the tank? id probably do only a few bags of sand then, make a thin layer..... enough for some play room.turkeyboy85;2157923; said:you only want about an inch of sand covering the bottem.... if that.. if it is bigger then that rays cant sift through it enough to "clean" the tank. I have never had a amonia problem from not cleaning the sand, the rays seem to do a good enough job of stiring it up themselves but dont put more then an inch in