That line of argument was always very persuasive, and in hindsight it seems blindingly obvious.
Let me turn it around another way. We add all kinds of goodies into our systems, and we keep adding it daily. We also have hundreds of strains of bacteria that come into our systems through livestock, rock, sand, algae (400 strains on average in the core aquarium microbiome see aquabiomics).
And yet, I'm going to buy a bottle of a handful of kinds of bacteria. And I hope that bottle is going to have the bacteria in it that will eat goodies that none of the other hundreds of strains in my tank every day are capable of eating.
That's a really big ask for a bottle!
oh, and also despite the fact that those bacteria in the bottle can presumably eat goodies that nobody else eats and that I'll keep adding those goodies every day, the bacteria will all die, and I'll have to get more of them.
What an unlikely proposition!
For sure! I totally agree! Yet I keep adding MB7 every week. Even though there's no discernable difference. Just out of sheer hope and other people's anecdotal claims