Fish tank disaster - Brooklynella?

ecossebear

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So I’ve just had my first absolute disaster of reef keeping in 7 years which has literally nuked my entire fish tank. I’m looking for advice or any assistance available.

So the story goes I have been keeping a community reef aquarium since 2013. I had tried to keep things as normal as possible because for years now it has been perfect with great coral growth and conditions remaining consistent in this time. Therefore I would only add live stock to the tank once per year when I would stock up on my clean up crew and maybe add a fish or two.

I had 2 clown fish that were in the tank from the start, 2 bat fish who were maybe 3 years old, 3 chromis (were originally 6 in the tank from the start but cut to 3 over the years), blue cheek goby and a scooter dragonette. The tank is a 250litre with a 30litre sump.

About 3 weeks ago I added my annual clean up crewe along with a few new fish - a wrasse and a orchid blenny. The big mistake I made was not quarantining the fish first, but having never done so and been okay until now I thought nothing of it! Within a week the wrasse had been looking unwell and I assumed that it maybe did not settle into the tank well. It disappeared (body no doubt eaten by the large amount of clean up crewe before I could find it) and again I thought nothing more of it. Then a few days later the bat fish started to look ill - it was as if there was a white slime coming of their gills. I set up a QT tank, gave them a fresh water dip and looked online for treatments. Before I could get anything bought they had both died. A few days later the clown fish, the dragonette, The dotty back and the blue cheek all started with the same symptoms. Again I tried the fresh water dip and again a QT but within a day both were dead. Then finally this morning (a day after the rest had died) the 3 chromis have died who had not been displaying the same symptoms.

All in all from the first fish taking ill until EVERY SINGLE fish in my tank died has taken less than ten days. Looking at the symptoms I am wondering if it is Brook disease? The corals and clean up crewe are all fine. The nitrate’s have spiked a bit between water changes (due to the die off!) but I have been doing regular changes throughout this to keep it down (below 40ppm). All other conditions have remained the same for the best part of 7 years.

Sorry for the long story, but the three main questions I have are:
1. Does this seem like Brook? Is there anything else it could be instead?
2. Will the inverts all now succumb to this or is it just fish?
3. How can I make sure the tank is safe to ever add fish again?
4. How long after the last fish has died would it be safe to add another (4,6,8 weeks?)
5. Will the tank be okay with only corals and inverts? Do I risk a spike of anything because there are no fish?
6. Any other advice would be greatly appreciated!

Many thanks in advance and despair! .
 
1)It does sound like brook due to the quick mortality.
2)The inverts will be ok as it is a fish disease.
5) tank will be ok with only inverts though you may want to feed them every so often

In the future i would advise not so many big fish for that size of a tank, as that probably caused some stress on those fish, and ill let someone else answer the other questions.
 
Thanks very much for the prompt response. The bat fish were the Platax Boersii which are the smaller of the species, and were the only larger show fish I had. The rest of my fish were small. I had always thought that Brook was only related to clown fish and, and that dragonette's were immune. Can Brook wipe out an entire tank in the space of a fortnight?

I guess now I will spend some time aquascaping the tank until such time as I can add more fish again.
 
Thanks very much for the prompt response. The bat fish were the Platax Boersii which are the smaller of the species, and were the only larger show fish I had. The rest of my fish were small. I had always thought that Brook was only related to clown fish and, and that dragonette's were immune. Can Brook wipe out an entire tank in the space of a fortnight?

I guess now I will spend some time aquascaping the tank until such time as I can add more fish again.
Yes brook is a very quickly spreading and killing disease. Its most comminly found in clownfish, but can be found in any species of fish. Dragonettes arent immune to diseases, they are less likely to have diseases as they have a thick slime coating but if they arent in full health this become weaker against diseases and can carry them between tanks
 
Sorry for your losses :(

Going "fallow" for 76 days usually starves out velvet, ich, and Brook. The only one it won't starve out is uronema.

Need to be mindful that we have seen some failures during a fallow period. Apparently some parasites can go dormant in the anaerobic areas of a tank. And then when you start back up, bam! They are back. So stirring the sand will help turn over the anaerobic areas a bit. However, there may be areas within your rocks and or filtration that are providing spots where the parasites can go dormant. So testing the tank after 76 days of fallow would be my move. Doing the "Black Molly Test" would go a long way to reassuring you that the parasites are gone and it is safe to start adding back saltwater fish. More info below:




 
Thank you for your very informative post and the links attached. Having used to be a fresh water keeper with a Black Molly, I am very uncomfortable of sacrificing one for my marine tank. I may give it the three months you suggest then add a pair of clown fish and wait and see how they are for 6 weeks before adding anything else. Could Uronema be what killed my tank?
 
Could Uronema be what killed my tank?
Usually but not always, you see the tell tale "red sores" on the fish's sides with uronema. But we have seen "internal" uronema. The only way to tell for sure is to cut open the fish and examine, especially along the spine of the fish. Look for darker coloration in the area.
 
Usually but not always, you see the tell tale "red sores" on the fish's sides with uronema. But we have seen "internal" uronema. The only way to tell for sure is to cut open the fish and examine, especially along the spine of the fish. Look for darker coloration in the area.
Certainly looking at the symptoms (almost looked as if they're scales were rotting of with white coating) made it seem like Brook. I had though ich at first but again the symptoms didn't look like it.
 

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