I bought some peat moss. The guy at home depot looked at me like I was retarded when I asked for sphagnum moss but lowes pointed me directly at a 3 cubic foot bag of peat moss. Only 10 bucks. Petsmart had spahagnum moss for 4 dollars and it was like a twentyth of the size of the lowes stuff. I mixed the moss in with the sand and had enough for all five of my tarantulas with big enough cages For it to matter.(the other 5 wouldn't benefit from more substrate) thank you guys for convincing me it was necesary.