Been known to dose MB7 yet without scientific proof it matters I consider it a placebo considering once established bacteria multiply so quickly I highly doubt it needs replenishment. Look no further than UV flow and wattage ratings based on how quickly bacteria replicate.
After having my eyes open to several Brightwell potions for raising pH claiming no affect on alkalinity and their claims of Kalk plus magnesium that left a sour taste in my mouth and lets just leave it at that.
I'll keep dosing MB7 cause it's cheap and I want to believe but then often find myself wanting to believe in Santa too
MB7, I have been told to dose it from folks at the LFS to deal with uglies, and I agree "It worked" but was that a placebo observation & report? Can't ever know.
I did see Elf, and Santa is Real!