Yes, having a theory is better than blindly taking action without any understanding of what you are doing. But as you probably well know, after a theory, comes testing, and properly interpreting the results. And then repeat, and repeat...
In your case, you started MB7 before doing the Chemiclean, which as I said was a total waste (hate to say it so bluntly). The cyano was already well established and being fed by your carbon dosing. Ideally, you are supposed to start the heavy dosage schedule of MB7 for 2 weeks even before carbon dosing. And then gradually increase (bio pellets, vodka or whatever). If you over dose with your carbon, you can be right back to square zero.
And then when you did the Chemiclean you probably wiped out any MB7 bacteria as well as the cyano.
So right now you are at square zero, and how you proceed from this point is most important. Like I said, this is when you need to dose MB7 heavily for 2 weeks. I would even shut down your bio pellet reactor for that time. Because right now it is probably not even working (needs bacteria) effectively anyway, and might just promote again the bad bacteria (like cyano).
Back to the theory and my experience, I have to say MB7 has worked exactly as I expected (and advertised), so I don't think my theory has been far off. What was especially telling for me, is in the past it tried to reappear when I had stopped dosing MB7 (because I was away for a few extended time periods). But after heavy dosage for a week, it would disappear. This actually happened a couple times, and each time I was quickly able to beat it before it got out of hand. But have not seen it for a long time now. Wish I could say the same for GHA and other algae (although I have a theory there, too, and my actions seem to be working with that too, now).
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