Lets use btk as an exampleThose naturally occurring contaminants are not the same as a purposely added ingredient to act as an algaecide. They are governed by different rules. In the case of pesticides the rules are quite explicit in that they have to be listed and registered. You would see something like 3.5% Busan 77, 96.5% inactive ingredients and then a list containing random crap like "killed bacteria".
What are Foray and DiPel?
Foray and DiPel are microbial or biorational insecticides produced by Valent BioSciences. They
contain the spores and unique crystalline proteins produced by a naturally occurring bacterium,
Bacillus thuringiensis subspecies kurstaki (Btk). These biological components are combined with
approved ingredients and water to make the final product.
When I buy the product the ingredients are water and Bacillus thuringiensis subspecies kurstaki no mention of the proteins (the insecticide) in the ingredient list.