Over the past year I have been slowly loosing a battle with GHA in an Acro tank. Lawnmower, Turbos, Hermits, 3 Tuxedos, Astraea snails, etc, and nothing would touch it. Turns out it was also home to some Ostreopsis dinos, so everything was avoiding it.
I have used Flux Rx Fluconazole per the box instructions in the past with success (1cc/25 US Gal). But after three weeks or so, the corals typically start to show a little stress. I was concerned about the Acros in this tank, but the GHA got to a point where I was willing to give the microdose a shot.
Past experience tells me Fluconazole is removed by GAC, probably GFO, and is definitely destroyed by UV. If you are running any of this stuff, the treatment will not work!
Day 0 – Dose #1 0.15cc/50 gal (1/10 dose)
Day 3 – Dose #2 0.15cc/50 gal (1/10 dose)
Day 6 – GHA started to look a little shaggy, with lighter tips
Day 14 – Progress seemed to slow so dosed #3 0.15cc/50 gal (1/10 dose)
Day 21 – With natural disintegration and manual removal, 98% of GHA is gone
Pausing to see of the CUC will finish the job or if the tank will require an additional treatment. The great news is none of the corals showed any sign of stress.
There may be something to repeating small doses every few days. But there is no question about it, Fluconazole microdosing worked wonders for me!