I have used Shultz's Aquatic Plant Soil, it also has the Profile name and logo right on the bag. Is this the look you are wanting?
I have had the tanks setup now for 3 weeks and everything is growig wonderfully. I have no issues thus far with the substrate, granted I did not use it the way you are but it is inert and quite suitable for the aquarium. I would recommend that you do rinse it a little though. It does have some dust, although very little. One interesting thing to observe about it is that the SAPS is so dry that it actually "steamed" (broke down the water so fast it evaporated the H2O) which I thought was neat. Small things amuse smal minds though
Hope that helps