There has been a good bit of research into just what and how many CFU(colony forming units) per gram or oz. there are in diff. brands. It has been pretty much determined that the stuff for septic use has essentially the same bacteria strains and enzymes. If you're good at searching, there is a good bit of discussion on different products and the best bang for the buck.
I see where the product you posted about says 12 trillions bacteria, but not per unit of what.
My research has shown that Rid X has the least number of CFUs per unit by a long shot. Some are highly concentrated comparatively.
When I had my pond drained and redug, I quit with the research, but will probably start throwing some stuff in since I started aerating full time again and I have gotten a pretty high concentration of fish. It can only help, but I wouldn't spend what most of these pond folks want for the stuff.
As Dave stated, the pond will naturally have bacteria grow in the presence of good O2 levels on the bottom. I feel that good aeration is essential and must be the 1st money spent.

Edit: Todd, in your case, 1st money....TH

Last edited by burgermeister; 05/17/10 09:38 AM.