Exactly... its just a math problem. Germicidal bleach is a combination of concentration and the manufacturer standing behind the manufacturing process to give you a germicidal solution in the appropriate concentration. That's why you need to look for the EpA registratiopn...with that and following instructions you get germ kill and also the certification that you did it. Important for food service, perhaps not so for household use. As it is, you could probably dpo the math on cheap bleach and get the same result if you knew the formula, which you don