Black tang with ich

[afm32607]

Okay. I have a 120 g FOWLR.
35 ppt salinity
Nitrates 10-25ppm (salifert)

I have:

Occ. pair
Rhomboid wrasse pair
Linneautis wrasse
Blood shrimp pair
Black tang

Today I noticed the tang has developed ich. I had just added the rhomboid wrasses a month ago after QT. everything seemed fine but I guess two new fish was too much for the tang to handle (I had not added fish for several months and the tang is about two years old).

I need some suggestions on what to do. I have the QT tank set up and running. The tang is fat and eating and no other fish are showing symptoms. Do I catch her out now while she is eating (trap would be easy)? Or does the stress of capture and confinement in a 30 gallon qt without live rock and lowered salinity make it more likely that she dies?

 

[afm32607]

Here is a picture

 

[afm32607]

Here are my thoughts and if anyone has input feel free to chime in. Tomorrow I will pick up formalin from the store. I will trap the infected fish and put them in a bucket of tang water, an air stone, and high levels of formalin for a dip. Then after 15 minutes in the dip I will put the fish in the QT at hypo salinity, using the drip method to acclimate the fish to the lower salinity I will then put the fish in hypos salinity for 28 days with twice weekly water changes, and then I will bump the salinity in the tank back up, return the live rock to the QT tank and observe the fish for an additional 28 days. At that point it will go back in the display tank. If nothing gets sick for 6 weeks after that I will assume I killed it off.

Thought? This worked last time (4 years ago) when I had too many tangs in the tank.

 

[Bruce51]

ich can survive 72 days in a fallow tank, If the tang has it they all do

 

[Dmorty217]

ich can survive 72 days in a fallow tank, If the tang has it they all do

+1 you need to hypo the DT if your going that route. If the shrimp are the only inverts in the tank I would get some Chloroquine Phosphate and treat per directions. The shrimp will be unaffected by the CP