I need ideas for a good monitor substrate. I need something relatively light for 48 sq ft (8'x3'x2'). I was initially going to go with 12 sq ft decomposed granite, 24 sq ft top soil and 12 sq ft sand, but that willbe very heavy for a setup in my house. I am going to use the 12 sq ft of decomposed granite I have, but am wondering if I should just fill the rest with light top soil or use something else. How good is cypress mulch or something light like that?

Thanks for your help

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