Marine velvet

[taikoboi]

Hello everyone my blue tang died and I'm not sure what the cause is. Does it look blue velvet?

 

[snorvich]

It is difficult to diagnose from pictures of fish out of water. What is the history of this fish? Source?

 

[taikoboi]

It is difficult to diagnose from pictures of fish out of water. What is the history of this fish? Source?

I'm at the end of my hyposalinity and and all parameters are fine. He's the only fish that died. Everyone else is fine.

 

[ThRoewer]

Doesn't sound like velvet with only one fish affected.
Without pictures of the live fish in the water I can only guess but a bacterial infection is a possibility. I noticed that bacteria thrive under hyposaline conditions and some fish get bacterial infections easily there while others are totally unaffected.

 

[taikoboi]

Marine velvet

Doesn't sound like velvet with only one fish affected.

Without pictures of the live fish in the water I can only guess but a bacterial infection is a possibility. I noticed that bacteria thrive under hyposaline conditions and some fish get bacterial infections easily there while others are totally unaffected.

Here are a few more pictures. Other fish are starting to look sick. I just had a yellow tang, maroon clownfish and a bi color Blenny die within two days. I'm not sure what's going on and all my levels are perfect on a 8 month system. I currently have a
90 gallon reef ready with refugium, protein skimmer, carbon and gfo reactor and a uv sterilizer. I added a blue tang that was already been quarantined from a local fish store directly to my tank. I think that's what caused all this.

 

[snorvich]

Appears to be brook. Hyposalinity does nothing for treating it.

 

[taikoboi]

If it's brook what is the best way to treat it?

 

[ThRoewer]

Yes, looks like a heavy Brooklynella infection.

Formalin dips in combination with tank transfers.
The first to kill/remove the parasites from the fish, the latter to prevent reinfection.

A minimum of 6 weeks fallow is required to starve off the parasite in the main tank.