Well, there have certainly been enough discussions about cyano lately.... But not sure where it comes from, or if it can be transferred. Have never researched Prodibio, so can't speak to that.
Like I've said many times here, though, MB7 has worked for me, and no more outbreaks for 2+ years now. Before that I had huge problems with it, similar to many others here.
You do have to kill the cyano first with Chemiclean (MB7 is a preventative, and will not kill cyano), then go on the heavy MB7 dose for 2 weeks, followed by the regular low dose for another month or two, and if all looks good, you can cut that in half again. Also, contrary to the instructions, I never had to shut off my skimmer, even during the heavy dose period
If you see any signs of it coming back again, go back to the heavy dose for a week or so, and then back to the regular. I had to do that a couple times at the beginning (but I had a really high nutrient tank then). But have not had to do that for a couple years now.
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