I can tell you that vibrant worked extremely well for me. I had a bad case of some sort of brown fuzzy algae/slime that was covering my rocks and killing snails. This completely resolved the issue in 1.5 months dosing 8ml every two weeks in a 93g. I’ve attached some photos of the algae. My mixed reef had zero losses during dosing. The pic is a before and after from about 3 weeks of dosing. Since then I have zero algae and corals are growing faster than ever.
I did have some losses from this algae, but not from vibrant.