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Did you do anything to resolve the conditions that led to the bryopsis bloom?
If the tank is still swimming in some excess nutrients you have to expect someone to use them up!
I like to think that this often either means too many fish (which means too much feeding, pooping and peeing) or not enough corals (which eat all those things and cover up space where algae might grow).
The fact that cyano is the algae that showed up "should" mean that the tank has no available nitrates, but lots of phosphates.
But that's a guess.Can you post all your latest test results?
If you did something aside from all of that to take care of prior conditions, let me know!![]()
I think folks also tend to see a "cure" thread and stop all other activities toward trying to figure out "what happened". If we could do more to encourage figuring out "what happend" here along with the fluconazole guidance, it would undoubtedly help.

No doubt. I'm not opposed to targeted use – it's yet another tool for the toolbox.
But I'm also not in favor of uses where repeat or systematic use is going to be required. That's not proper use of a drug like fluconazole.
If you (or anyone) is really tracking bryopsis in on frags and it's re-blooming, then I think there may be deeper issues to look at: where you get your frags, how you pre-treat them, and many aspects of system setup and husbandry all come to mind.
I think folks also tend to see a "cure" thread and stop all other activities toward trying to figure out "what happened". If we could do more to encourage figuring out "what happend" here along with the fluconazole guidance, it would undoubtedly help.
How long has the longest tank been clear of bryopsis so far after this treatment?
Has anyone (who speaks the language) kept up with the discoverer's experience that we know of?
I just hope that there is a "correct dose" and that we don't have a flurry of tanks come back with blooms because the bryopsis was just waiting for the effects from the fluconazole to subside.
(Bryopsis is hypothetically capable....stuff is amazing!)
Bryopsis bloom? , my bryopsis came in on a frag plug, I didn't know it was bryopsis at the time,I started removing it manually but it kept coming back, after some research I realised it was bryopsis and I may have inadvertently help it spread, after googling I stumbled upon this thread and had nothing to loose by giving this a go, I never had a massive outbreak of the stuff but was a case of nipping it in the bud before it got too bad.
Too many fish? I have 5 in a 220 litre system.
Params as follows, I test twice a week using salifert test kits and my params are pretty constant and don't stray from these as I use a doser and an auto topup.
Sal - 1.025
ph - 8.3
kh - 9.6
cal - 450
mag - 1450
am - zero
no2 - zero
no3 - 5-10ppm
po4 - zero ( has always been zero and has never showed anything but this)

I named the thread "My Battle with Bryopsis using Fluconazole". If you don't agree with having "cure" in the title,you'll have to take that up with @revhtree as he changed the title to what you see now.![]()

However I try to get people who I know for sure that has green hair algae to use H2O2 and proper husbandry. I have found that most of them do not do proper water changes or do not use Rodi or change out the Rodi media when needed.
I would love newcomers to the thread to get a basic set of questions about that stuff every time. (To me it makes sense if, ordinarily, they would be encouraged to open their own thread AND participate here vs trying to do all that within this thread though.)It's a dramatic title, I can't begrudge that.
I really just don't want this thread to become a victim of its own success so to speak.
Going by precedent, it can get to a point where it starts derailing people from taking basic corrective actions BEFORE treatment.....if not instead of treatment. There are good example threads where this has already happened so I guess I may be extra sensitive...
This thread, by contrast, has a tool that's actually effective....but (preaching generally here!)
Fluconazole is not a tool like h2o2 or even bleach that essentially "goes away" when we're done with the treatment. Most of the fluconazole molecules will go down the drain with the post-treatment water changes and go on to encourage resistant microbes all along the waste stream.
So we should try to encourage conservative usage as much as possible.
To anyone's knowledge, has anyone trying one of the OTC azoles? Clotrimazole, for example, is also an azole-based ergosterol blocker but is OTC.
Fluconazole is not a tool like h2o2 or even bleach that essentially "goes away" when we're done with the treatment. Most of the fluconazole molecules will go down the drain with the post-treatment water changes and go on to encourage resistant microbes all along the waste stream.

+1I wholeheartedly agree. I think that as this thread has evolved it has taken the stance of "what other kind of algae can I throw this med at" in a way. This is NOT the way the thread was started or intended to go. I think honestly the real number of cases where people have/had bryopsis vs gha is somewhat lower simply because you get that feeling of "well I did a water change and it didn't die,must be bryopsis". People not knowing what kind of algae they actually have though doesn't mean that they shouldn't be able to enjoy their tanks. Most of the time if someone isn't sure if they have bryopsis or not,we try to get them to take pics.(side note coming here) I have yet to find any info of any strain of bryopsis that doesn't have the fern/fan type blades on them.This seems to be a common trait. If anyone can find anything other than that,please send me a link as I have read tons of info and can't find anything different.
I have encouraged people to use the lesser amount of what was being experimented with from the beginning(because I chose the lesser amount and it worked for me).Someone else was using almost twice as much overseas. There were a few people who tried to use a smaller dose with mixed results. (worked for a couple people but not others). Twilliard is working with this med right now and running tests but I think he is fairly busy with school.
This is true but where do you think this med goes during urination and bowel movements while treating someone for infections? How much of the meds are used up by our body vs by our reef system instead of ending up in the same said waste stream?
I'm not sure if anyone has tried any of the other "azole" meds or not but it was talked about (cant remember how many pages back) in the thread. We were wondering the same thing.

How much of the meds are used up by our body vs by our reef system instead of ending up in the same said waste stream?
I don't understand what you want me to change my poll results to.But the poll says "Did it kill ALL your bryopsis?"
If the tank's cured, there's no bryopsis right?
Thus justifying the use of a chemical like Fluconazole.
I do understand where you're coming from with the frag/reintriduction idea...but that's sort of my point.
I think we've been "duped" in a way – this is not a cure in the way that we need it to be. It only targets the symptom of a problem, and it only works while being administered. No protection is offered after treatment.
We would all be better off fixing the causes for the plague-level algae outbreaks we have whether we choose to implement this cure or not.
If a tank is ripe for algae and nothing is done to change that, either bryopsis or GHA (or something else) is almost a sure thing.
If we can step back and think about how we're using the meds in question, treating under these conditions might even be a little irresponsible on our part. When doctors prescribe this med it's under very strict usage and disposal guidelines – because it's a strong, important drug with significant side-effects for the user as well as the environment.
In the light of our limited position as hobbyists (no microscopes; no expertise), it would be awesome if we were being a lot more conservative with our use of this cure.
If you follow this thread's way of dealing with the problem by hitting the symptom with a medication – you've got a super-medicated tank on your hands.
This is not Vitamin C and sunshine that we're dumping in our tanks after all – so how long can that go on? (Drug resistant Bryopsis, or who knows what else, anyone?)
(Can the folks using fluconazole in their tanks absorb the drug through their skin from handling the pills or from the tank water?)
This is starting to feel more like the dino thread...repeating supposed miracle cures and not enough attention to other factors like cause-elimination.
80/20 still-intact coming out of a human, from what I've read.
This is probably ideal from a treatment perspective since most of the drug stays active the whole time it's in us.
It's the opposite of ideal for the post-treatment time though....
In the waste stream, from what I've read, even under sunlight it doesn't degrade very well. Even the breakdown products are active and resistant to further breakdown. Most of the lit. on it is not free, so that's mostly gleened from abstracts...def. would like to know more on how it does or doesn't break down.
80/20 still-intact coming out of a human, from what I've read.
This is probably ideal from a treatment perspective since most of the drug stays active the whole time it's in us.
It's the opposite of ideal for the post-treatment time though....
In the waste stream, from what I've read, even under sunlight it doesn't degrade very well. Even the breakdown products are active and resistant to further breakdown. Most of the lit. on it is not free, so that's mostly gleened from abstracts...def. would like to know more on how it does or doesn't break down.
Glad to hear your tank is looking as it should
Fluconazole as we know doesn't kill all species of GHA but is worth a shot when nothing else works. Most GHA will die using h202 treatments however.
And another required repeat...
Can you also link your own thread here where you've recorded all your test results and what you've tried so far? Include all your system details if that's not already there too.
I see.Just an silly-sized pic.
Still reading...
Started about 3 months ago with some turf/hair/bubble/bryopsis algea.
Started using Vibrant Reef Cleaner and it work amazing on everything but the bryopsis.

The Vibrant also took out my cheato, well most of it and I just removed the rest.
Started 1st try, 6000mg for 300 gallon system. Shut off skimmer, carbon, and only ran filter sock. About day 8 bryopsis was getting its *** kicked but also a few of my SPS including a colony of acro (well established coral in my system).
Decided to start skimmer, carbon and water changes. NO3 and PO4 had spiked at this point 30ppm and .10ppm respectively.
The acro RTN and luckily I was able to save one single tip, about 1/4".
Got some cheato from a club member and a very LARGE LED grow light.

By day 10 all bryopsis gone and system was fantastic!!!!
First: An upset balance due to changes made to execute the treatment. Should wait until the right time and not when contending with other problems also.
Second: mismanagement or poor maintenance practices before/during and/or after treatment.
Treatment works for its intended use, however to be done well you need to have planned it out well and expect to contend with the nutrient added equal to the amount of dieoff that WILL occur.
Agree?

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