Okay, I have the soil in the tank, but nothing else yet. I mixed some pea gravel with sand and tried it on my 20 gallon and I like the way it looks. (I gutted out and completely overhauled the 20....to the demise of my poor little frog.
)
By the way, I tried a bit of sand only and it did mix in with the soil, so, sand on soil is a no-go for NPT.