There are tins of bacteria additives on the market, and for the cost, mb7 works very well.. As the above user stated, if you are using some form of carbon dosing, it works extremely well.. I have used it throughout the years, though my mainstay is zeobak(it is excellent for jumpstart of my pellets). But when I did use the mb7, I utilized the maintenance dosage..
But it works well..
From note 5.. rip note 7