Just found this on http://www.aquaticplantenthusiasts.com
Orlando has the prototype...
Here is the info he has so far...
This is quoted from Cal Aqua Labs below.
Special characteristics of Black Earth Premium:
1) Does not leach ammonia
Although Black Earth Premium is highly-fertile and rich in organic nutrients (it is formulated to contain similar or slightly more, organic content as ADA Amazonia), our unique production process locks the ammonia inside the substrate. This assures that most of the nutrients remain within the substrate for the plants, and not washed away by water. As a result, the substrate remains fertile longer. This also makes your aquarium less prone to algae outbreaks, as well as keeps the aquatic inhabitants safe and eliminates long cycle times.
2) Unique production process = durable granules that extend substrate lifetime + better preserved nutrients
CAL AQUA LABS developed a unique process for the production of Black Earth Premium that results in cohesive granules that are not brittle under prolonged submergence. As a result, they suffer significantly less brittle fractures and prolong the lifetime of the substrate. Our unique production process also better preserves the natural nutrients within the soil than conventional methods.
3) Polished, crystal clear water
Special ingredients blended into Black Earth Premium have the ability to capture and bind small colloidal particles in water. As a result, the substrate doubles as another biological and mechanical filtration unit with massive surface area. This results in amazingly polished, crystal clear water.
4) High density granules
The Black Earth Premium formula creates granules with high density (a 9 liter bag weighs approximately 19.8 lbs, and since our soil is shipped bone dry, thatís 19.8 lbs of ALL soil and no water). This translate to heavy granules holding down plants better.
All credit for this goes to Orlando.