Although never used Black soil, used on few tank the products by Tetra & Dupla. Cant remeber the name since it was done some 20 yrs ago. It worked well with Plant but took long time to set up and long time for water to clear up even when used Vortex Diatom Filter. Besides when disturbed while planting, it would go hazy for while.
If want to try, try in small tank or jar to see what happen, just curious. I will bet that once filled w/ water, it will contain high
nitrate and phospate. May even show
ammonia upon setting up. Run experiment do see if this idea is feasible for Aquarium
If have backyard, try setting up in small container/tank. filled some black soil then small grave then coarse gravel to hold the soil down. Put little jar w/ wider plate under the jar in the container and have the water gently overflow from jar into to plate. This will help you not to disturb the bed too much. Worried about mosquito, could use mesh to coverthe top. Once you think water is safe, try some fish (killies, Endlers, which will do fine outside in your climate zone) to control mosquito.
As far as terrestrial microbes/parasites surviving submerged in water, I strongly doubt.
Can even use this container to raise some aquatic/bog plant after the experiment is done thus wont alter the water chemistry. You can even see flowering of these plant once they can have stalk/stem grow out of water.
Used to use peat moss/Tetra product in jars to spawn many Killies. If you can somehow cure(
) the Black soil why not? If do run experiment, post the results..
Only thing I will be worried about is if it contains PESTICIDE but if bag says Natural it may not!!!
BTW, what kind of land plant do you use this black soli/sand combo? I have used potting mix/sand combo for many succulents (cactus, etc) w/ good results. Just curious.
Similar Aquarium Fish Forum Threads 
not me.