I'm a big fan of ADA (if you can't tell) and try to keep my setups as close to possible to Amano's recommendations. Despite that however, I do not use the soil additives in my tanks. For me it was mainly a cost saving measure and not a matter of usefulness. I do have Bacter 100 but I apply that to the Bio Rio in my canister filter every time I do maintenance. No clue if it's doing anything but also have never had issues.
The bottom line is, nobody on these forums can tell you for certain to what degree the additives do or don't benefit the tank. All that we know is that many successful ADA tanks have used the additives, so we at least know it won't harm the tank. Whether or not each additive is beneficial is widely debated.
If you have the money and would like to keep your nature aquarium as close in style and spirit as an Amano tank then I say go for it.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
ADA 60P Iwagumi Style - Jul 2017
ADA 30C Nature Style - Aug 2017
ADA Mini M Iwagumi Style - Sep 2017