ADA soils are much more prone to breakdown (mudding) during the cleaning process (though I know several that carefully rinse the soil and then dry before reusing - this allows the “dust/mud” to be discarded before re-use)
If you want to give it a go in-tank, I’d follow Filipe Oliveira’s protocol as shown in the Aquaflora Vlog video and his home rescape FB videos (I’m not sure what’s still online as I watched them “live”)
Note in his home tanks, he was much less aggressive with the soil cleaning, but noted it was important to “top” the used soil with 2-3cm new soil (he forgot to do this for the kitchen tank rescape and had massive algae issues in the first several weeks ... of course, he’s FAAO so he wasn’t too worried
)
If budget is an issue and you’re prepared for extra water changes/maintenance etc, then re-use the Amazonia (if it’s only single use and you weren’t frequently adjusting plants, hardscape etc, soil should be in decent shape (though occasionally ADA does have production runs that produce softer end product))
If reusing the soil after rinsing (and skipping the drying stage), I’d dose lean water column nutrients for the first 2-3 weeks, depending upon plant growth, water changes etc
Note that as this is “used” soil, you’re unlikely to see the significant “softening” effect of new Amazonia, also nutrient profile/release will be different (especially if you used the complete system initially)
As an advantage, you should have a complex micrflora environment in the soil - most of this will remain even after rinsing, though actual numbers may decrease, bacteria may have a lag phase etc, - if soil is dried, then expect “like new” soil re microflora
Re tank “cleanliness” (which can have rather different meanings for different people), if the tank was well maintained in its first run, I’d not be overly concerned about “washing” - just some gentle rinsing to remove dust as you’re likely to stir this up significantly when rescaping, replanting etc
If your previous livestock suffered various diseases, you had extraordinary algae issue etc, then I’d be more likely to thoroughly clean and dry soil (or just purchase new as I’m lazy ..... though I did just (finally) rinse and rescape a 30C, 60P, 60H (45) last week)