Waste not want not
. Having put any efforts into prepping it I would use it. Remembering the goofs and games my son and I put in vs reward in the stainless 2 story setup (all the layers) or the screening of fines for the grow out rack honestly they all grow plants.
You can do this so many ways, the costs are low, the results so similar. With the rare exception of 1 or 2 soil farts (my own ignorance starting out) inert substrate and root tabs have caused me way
more grief than any soil based tank.
Anaerobic imbalance is a problem much like pH crashing, much concern but seldom truly reported. With any substrate in a tank anaerobic conditions exist dirt or no dirt with maybe the exception of reverse flow UG. How much might become the concern messing things up but honestly I think it's rare. Even popping a stinky sulfur bubble (dying overpopulation) or finding a blackened stem it's never been tank ending here. Poke new plants through the cap and move on. Small stumbles here and there maybe early on but long term I've yet to find a way to really mess this up. Nowhere in my journals to date will you see any report of tear down and restart due to failure, because I haven't had a tank system fail to date.
I keep stock loading low starting out. I avoid most new tank disasters by stocking critters lightly starting out. That along with going big on entry quarantine to avoid importing problems. The longer I tank the more extensive my quarantine protocols become.
As far as soil tanking goes:
(Favorite Tom Barr comment) never a one trick pony.
(Personal blurp about it) Nobodies wrong as long as nobody dies.
The first dirt tanker was a Caveman (without insurance).
Use it (imo) but work less and tank more in the future.