.... we used mostly composted cow manure, mixed with a bit of kitty litter, as a substrate. it is capped with an inch of paver base. a bit ambitious....
OUTSTANDING!!! I'm a very strong supporter of taking an organic approach.
....Just to reassure newbies.. Auban has been doing things like this for a while, don't test this unless you're willing to crash and burn at least once.
I would offer there needed not be any worry over failure, IF one is willing to do some research and follow some simple proven steps. The biggest problem with newbes is they want instant ADA contest champion tanks and that only happens on reality shows, thanks to careful editing.