I started my dirty little tanks way back in the late '70's when almost everyone I ran into said, "NOOOO!!!!! DON"T DO IT!!!!"
Been doin' it ever since.
Today I have four tanks that have some form of dirt in them. I use leaf loam about 1/4" - 1/2" capped with Paver sand.
Two 10 Gallon tanks.
One 20 G Long
One 30 G Breeder
I'll Take that Number 4 position thank you.