R2R link, but a user there has a really good write-up (with lots of delicious scientific backing, and backed up by Randy Holmes-Farley) that indicates Vibrant is Algaefix and that the ingredient list is (at best) wildly inaccurate:
Understanding Vibrant: Algaefix, Polixetonium Chloride / Busan 77
The purpose of this post is to look closely at Vibrant to compare its properties to a known algaecide, Algaefix by API. This is intended to shed light on the active ingredients in Vibrant, explain its mechanism of action, and give people insight into its use and what to expect. It is not a...
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