The theory I guess behind the no macro-algae suggestion is that it competes with the zeovit bacteria, and that if the zeovit bacteria can't thrive then the supplements you dose get gobbled up by things like cyano. It's explained better over at the zeo website. All I know for sure is that almost as soon as I quit trying to grow Chaeto in the same system that the zeo was running I saw a positive change.
Bryopsis is tenacious stuff, even the true die-hard zeoheads over on the zeo site won't claim that zeovit will handle it!
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