In this industry most reviews come from users, this is why we openly give away samples to people who show genuine interest and let them post unbiased results just like the Ultra Clam and the Ultra Lith.
However blogs such as
http://stonyreef.com/ often carry very unbiased reviews on fauna which and worth looking at.
Other than that email Claude directly as I know some bio nutrient research has been done on his products and he will have the results
Info@faunamarin.de
One thing Fauna is very proud of is being open with his products, even down to posting the full ingredient lists, when a product works there is no reason to hide what is in it right?