150 gallon tank which is 6 feet long. How much weight worth of rocks can it hold???? I didn't put down any egg crate and it already has the sand in there so it would be really hard to put the egg crate down now. Do you think I could just put in two rocks, one is about 20lbs and the other is about a foot long and maybe 40 to 50 lbs and i think i overestimated that weight. The glass on a 150 is thick it can hold those rocks without egg crate right???