What did this? Velvet?? Brooklynella??

stefdvm

Member
I have a 65 gallon set up at work, FOWLR. Started out with a half dozen fish or so, including a blue headed wrasse. All purchased from Live Aquaria.. The wrasse did not come from Diver's Den :worried:

About 10 days after they were put in the tank, the wrasse started acting funny - became sluggish, spent a lot of time on the bottom of the tank which was unusual for him. Died a couple of days later. Over the next week, I lost everything else in the tank, one by one. Last thing I lost was my little blue spot puffer. I noticed that he seemed to almost be sloughing his skin. With a little research here, I surmised that it was most likely either Velvet or Brooklynella. I tried formalin dips, but I guess I was too late. Once the last of the fish died, I left the tank fallow - from mid November until the first week of February. I thought that I was "safe" at that point... and I bought another half dozen fish.

A couple of the little ones disappeared... and then I noticed that the large, healthy, robust ones seemed to be rapidly losing color. My black combtooth blenny went from midnight black to gray, seemingly overnight; he was no longer active and all over the tank - he was hiding, then lying on the sand, then he was dead. Another oddity that I noticed - the fins became ragged shortly before they perished. I initially attributed it to inter-tank aggression. Currently, I've lost everything but the little saddle puffer.

I have dosed the tank twice with metronidazole, on Wednesday and again today. The puffer is still swimming, still eating, still acting completely normal. The inverts are seemingly unaffected.

I did a mucous scraping of the bangaii cardinal when he died but didn't see much except fish scales. I'm a veterinarian but don't like cytology, and searching for causal organisms isn't my strong point. When the dottyback, died, he had red marks on his sides - they appeared on Wednesday, I found him upside down on the sand on Thursday. Again I scraped his side, again I saw nothing that i recognized as significant. I also pulled out some material from his gills -- on this I found little black spots but truly I don't know if they are "normal" or part of whatever this disease is. I took pictures of the dottyback before his "burial".

Either my 9-10 week fallow period was inadequate or the organism survived in the rock / sand or invert population. I need to figure out what this is so I don't subject any more creatures to it's devastation.

Any guesses or suggestions?

dottyback2.png


dottyback1.png
 
Looks similar to what happened to my lyretails in QT. I suspect uronema. Still have one that survived and is in QT.

I'm going to does cloroquine phosphate. My wife is a vet and wrote a prescription for it. We got 50g of powder. You can call around to smaller pharmacies and they can probably get it for you.
 
I agree with the others ^^^, looks like uronema. I would start treating your Puffer with Formalin. For as the DT, it may be best to break it down and bleach everything and restart.
 
Well, as much as it stinks, it's good to have a possible name for this... since there's only the 1 fish left, I can put him in my hospital tank at home and break this one down... sigh... thanks for the insights!!
 
So... assuming that I have Uronema in the office tank, I have a question. I've treated with metronidazole which has anti protozoal capabilities, but don't know if that will eliminate the parasite. I've been told to break the tank down and bleach everything. This is definitely possible, but... here's the dilemma -- I have a tuxedo urchin, a teddy bear crab and a saddle puffer, 2 anemones and some zoas that are all seemingly unaffected. I can formalin dip the puffer and keep him separate from the others, but what happens after I bleach the tank? Can I put the teddy bear crab back in there or is he going to be carrying the uronema? Will he carry it to a hospital tank? I am assuming that I need to discard / replace the sand and bleach the rocks? I have searched for information on the parasite but haven't come across the level of information that I'm looking for. I know that Uronema is free living and doesn't require a fish host, but WHERE is it living? In the water column? In the sand? The rocks? On my crab and urchin? ANY help is MUCH appreciated. The losses in this tank have been fairly devastating for me. I'm pretty good at fish keeping and this was a HUGE screw up on my part. I feel horrible for what the fish went through and want to make sure that I do whatever is necessary to eliminate whatever has killed my livestock. TIA
 
I don't know if there is a fallow cure time for Uronema, as it does not need a fish host to survive in the tank. That's why it's recommend to break everything down and bleach it. I always do a Formalin bath upon arrival (out the bag) and another one before entering the DT after the quarantine process.
 
But what about the inverts "carrying" it. Do they? If he transfers them, will that transfer the uronema as well?
 
But what about the inverts "carrying" it. Do they? If he transfers them, will that transfer the uronema as well?

This is a good question. Honestly I do not know about invert carrying the parasite and maybe the experts will chime in soon. I have came across this parasite twice with Anthias and a Flame Angel, but I was fortunate enough to have caught it during the quarantine process, before reaching my DT.
 
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