In my 29 gallon medium/high light tank with pressurized or DIY CO2 I want to have an aqua soil base, and on top of that I want some sort of black sand. Does anyone know where I can find the cheapest, and how much of it would I need to make maybe 1 1/2-2 inches depth, i don't want to aqua soil to get washed around in the tank.
I am having trouble finding the answer, but how big of a size difference is it between T and S grade? I found a place somewhat close to me that sells both, one is $25 and the other $30 a bag. They actually advertise it as aquarium gravel. Figured I'd use that for my 150g.