We do a lot of research on muck and wetland soils.
I have to honor of processing and washing 1000's of lbs of delta sediments for use for my research, oh the glamour
I've got plenty and have been playing with it in a number of different systems to get a good feel. We send it off to get it analyzed etc.
It's great and will grow any plant well without any water column fertilization.
I rinse it well with a hose and screen it through a window type size screen.
I place this over a wheel barrow. Then the fines settle and the murky stuff decants over the edge.
I let that settle for 1-2 days and consolidate.
Then carefully decant.
Then I let it dry and dewater some till it's a nice pasty clay.
The washing helps oxidize the NH4, which is the problems with new soil tanks.
Now you can boil the soil for 10 minutes to do this, bake it for an hour or so, this will oxidize thermally the NH4 to NO3.
Or do the bio method,: soak for 3 weeks in shallow tray to oxidize the NH4 via bacteria.
All work well.
You can mix the soil with 1:3 parts soil : sand and then make a nice 2" layer or so of that deep and top with another 1-2" of 2-3 mm sand, SMS etc.
I've found some growth difference between ADA aqua soil vs delta sediments, with more growth with the delta sediments over an 8 week growth study using 3 aquatic weeds.
I also used Top soil(no pre soak and pre soak).
The no pre soak had blackened anaerobic roots, some on the pre soak.
None on the ADA and none on the delta soil.
The system was flow through so interactions between the water column and leeching can occur.
So only the sediment is the source of nutrients, totally lean water column via a large DI unit and stable ambient low CO2.
Good stuff to use.
the removal of NH4 resolves 90% of the issues folks have with soil and some other care and tricks resolve the potential mess. So do not move plants around a bunch for awhile.