My system is no more than 70gal total water volume. Display is a 40 breeder Coast to Coast custom tank. My sump is in my basement and holds about 10-15 gallons, and has an additional 10 gallon fuge built into it.
I wanted to share my battle with whatever green algae I had in my system. The short version of the story is that it took two doses at 160mg total and two months to get rid of the bryopsis/green hair algae/tuft algae. It was green, a *****, and would not die for years. There are several forms of bryopsis, mine did not look like a fern. I plucked some algae out and put it in a small dish, poured hydrogen peroxide on it, and it did not die...ever. I read somewhere that was a good test to know if you had gha cause the gha should die and grey out rather quickly.
Anyway over a month ago I dosed 70mg of fluconazole from the website everyone is buying it from, left my external skimmer on with the volute open all the way, no skimming, but still getting oxygen. I turned my lights low and did not run my fuge light. I removed gfo and carbon. I waited 4 weeks and nothing, it actually got worse.
Then I dosed 90mg more. Turned skimmer completely off, no gfo, no carbon, fuge light off, but left my tank light cycle normal. Everything is gone. No algae left. I noticed that areas not in direct light or in shadows took longer to die. No livestock was lost. I turned my skimmer on today, and will close the volute tomorrow. I will be doing a large water change tomorrow.
Do not be scared to over dose this stuff in your tank and blast the tank with light while dosing if your corals can handle it.
Thank you to everyone who has contributed to this thread.
