Substrate?

[Jennkp]

I did. I waited until it all settled bc I'm OCD about stuff like that.

 

[DannyBWell]

I agree check local stores like farm and fleet ace hardware tractor supply homedepot stores like that you will always get cheaper sand there only thing is you have to wash it since its untreated washing it with water once or twice a day for a week should be fine the more you wash it out the better hope this helps