What is this?

[urbor]

I really need some help. I dont know what this is and I dont want my fish to die. OK so I bought this fowleri Tang about 3 weeks ago. He was in a 30 gallon QT with some live rock. I was not medicating or hypo the QT or anything like that. Well he was really skiddish and kept jambing himself under the rocks. Then I finally noticed these marks on his side and I just thought it was because he keeps jambing himself under the liverock and is gettting cut up. So I made the discision to put him in my display tank because I felt that he would be able to recover from what I thought to be cuts. Well now he has been in the display tank with no competitors. He does not seem to be getting better, I think the size of these marks my be increasing also. My water parameters are all very good, actually they are about perfect. I have him eating mysis right now soaked in garlic, zoe, marine c and selcon. He eats alot when I feed him twice a day.


So does anybody know what this is so I can treat it.

 

[wooden_reefer]

What you did some books tell you to do. Some books say that QT is to observe, I think it is a garbage concept.

QT is the best chance to treat preventively or to commit to eradication, whatever the correct idea for each class of pathogens is, for ich, external bacterial infection etc.

It is not always easy to tell. May be it is an external bacterial infection, but there appears to be a lump of growth, that also could indicate the viral cauliflower disease.

If you have not yet returned the liverock you used in QT, or you can more or less still identify the LR that you used in QT, use it. Use it in QT. After three weeks (I guess) with the tang, there are likely more nitrification bacteria per unit volume than other LR you have. Having higher nitrification capacity in QT is frequently a valuable asset especially when you have to medicate, selectively. Copper on live rock is said to have an impact on sensitive invertebrates in the future, however. I never use liverock as the filter medium in QT.

I will always use UV in QT against external bacterial and viral infection in conjunction with eradication of ich using copper or hypo.

Quarantine is NOT to observe but to treat decisively by as much as reasonably possible.