The sand would work fine. Sawdust might, too, depending what kind of wood, splinters, etc. You can buy inexpensive bags of potting soil and such that would work, too. It's really not that hard to come up with something.
To the person who puts a cup of DE in, please be much more sparing with your use of this, It is rough on their (and your) lungs, even the food grade.
To the person who puts a cup of DE in, please be much more sparing with your use of this, It is rough on their (and your) lungs, even the food grade.
