The attached files where just want they have on there web site. From my understanding of the info provided the bacterias consume "in the tank, the bacteria eat the non eaten food, the fish excrements ... to transform them in biomass."
"And to BOST the bacteria work, we have develop a product "BIOPTIM". This product is made to enhanced the activity of the bacteria in their tank cleaning and balancing job"
Our tanks should have enough food to support the bacterias to bring our phos and nitrates under control. This is like add some new live rock as a tank ages these bacterias die out or only certain ones survive hence one fo the issue with old tank syndrome. So by just adding BIODIGEST, should not only be coral food which is plus you are adding the readding and refreshing the bacterias need to optimal denitrification and phos removal. I am hoping not to have to use an GFO, the cost difference is huge BIODIGEST is so much cheaper, its when you are adding the BIOPTIM the cost really goes up on larger systems. This is also a much more natural way of filtration. Just my two cents and what I am gathering from all the reading I am doing.