It's not an assumption at all. Look at the zeoguide, look at KZ tanks, look at all the evidence on zeovit.com. All point to the same thing. Adding something which causes bleaching, then trying to control the extent of the bleaching, so that it doesn't kill the corals.
And you've pin pointed you're problem right there. You think you know what i'm thinking.
Maybe if you read and take in what I actually write, rather than making up what you think i'm thinking, then some of the threads on here might not be so rediculous.
Layton