First we want to note that Algae Buster has been preemptively discontinued for the time being due to inadvertently likely falling into an EPA loophole, and has been relabeled as Reef Flux, a fluconazole treatment intended for use on fish with certain fungal infections.
In regards to dosage of Algae Buster, which has been discontinued so I am replying only for informational purposes just this once to answer lingering questions, we had such great results at 10mg per gallon that we stuck to that dosage. It consistently nuked everything, as you can see by
@Mengchhorn Chhun's results after 5 days. This is the reason we feel it is a good idea to avoid imported capsules that can have fillers or be expired. There really is no telling how old they are or the percentage of fillers in them or what those fillers even are, and when we tried those at 10mg per gallon it did not have great results.
We did note some things very recently that led us to believe 20mg per gallon may be a better dosage to prevent possible re-growth of certain Caulerpa species after over 6 months of having disappeared. It may have come in on other rocks but was possibly re-growth, so we would have doubled the dosage of Algae Buster or added notes for specific Caulerpa species after these Caulerpa tests had it not been discontinued.
We will most likely be doubling the dosage on Reef Flux labels due to reasons completely unrelated to the above after more experiments that are also completely unrelated to the above. To avoid any misconceptions on the intended use of Reef Flux we will be steering clear of this thread, but are happy to answer non-algaecide questions in our sponsor forum here on R2R. We sincerely apologize for the oversight that led to a necessity to relabel.