You do and you clean it up!Ergosterol is the predominant sterol of fungi and green algae. Fluconizole inhibits it's enzymatic synthesis. Although the biosynthetic pathway for sterol synthesis in fungi is well known, not much has been published regarding it's synthesis in Algae. Symbiodinium may not contain lanosterol 14- α-demethylase (the inhibited enzyme), so it may be "reef safe", but there always could be a variant species. Use caution, and congrats for venturing into the world of unknown in science.