Hi Joe,
I use Red Bee Sand in one of my tanks. It lowers the pH, KH and GH. In general I'd recommand it for CR or if you have hard tap water in gerneral. For all full planted tank you must add fertiliser. I guess that a waterplant soil like ADA gravel is better for tanks in nature style like T. Amano showed.
The use of SRBS is discussed controversly in Germany at the moment. Some holders lost shrimp and it it not quiet clear why. I suspect the GH has been too low in some cases or that the simply refillment of eveporated water may advantage bad bacteria (if one is using a bad filtration).
Cheers,
Imke
P.S. Maybe this article on my blog is helpful too.
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