Interesting, I just read up on Duplabaccies (http://www.dupla.de/e058.htm
I had assumed that this stuff was the usual nitrosommonas/nitrobacter bacteria used (though this is disuputed now) in the Nitrogen cycle.
But this stuff is "bacteria necessary for the breakdown of protein compounds and cellulose", including organics...
First I've heard of adding this to an aquarium. Anyone seen any studies/articles showing that this 1) exists naturally in aquariums and 2) really has any beneficial effect?