Hi
Dlealrious, this is my experience with Fluconazole from another post.
I am from Cardiff Uk,
I know the correct advice is to find out the cause but its frustrating when you think your doing all you can and the GHA still persist,
I had it bad recently, on every rock and smothering my corals whilst I tried different approaches to get rid of it, but I have totally wiped it out, heres how:-
Look on youtube for Fluconazole treatment of GHA.
Its a treatment for human Thrush
In the stores its £5.99 for ONE capsule!!!
So I went and had a chat with my chemist [ not sure he believed me when I said i need a Thrush treatment for my marine tank but he was game ] he can buy them for 39p from Bristol labs, he sold them to me for £1 each,
I have a 700ltr tank so I needed 18 capsules for a 21day treatment, holt cow it is amazing!
Started to see results about day 3, the ends of the GHA started going grey / white, I added the powder inside the capsules [ not the capsules ] 18days later and I kid you not, its all gone, absolutely amazing!
my filter socks needed changing every day as the GHA came out, I stopped GFO and carbon and I took the skimmer cup off but left the skimmer running.
Lastly I have not lost any animals and all my rocks and sand a clean.
Best regards,
Nik