Gee, I have to respectfully disagree with Rye. I have the UPAqua shrimp sand in 3 tenners thus far, and not only is the ph in the 6's, but my TB and crs/cbs are breeding fine. One of my tanks have had the shrimp sand in it for over two years and it still is working well.
Having said that, I have heard that it doesn't work for some people, yet I've never had a problem with it.
But yea, I use the shrimp sand, and not the soil.