Gem Tang - Lateral Dark Patch

[BorgD]

I have a Gem Tang which has been with me for 4 months now. On 7th April I noticed a small dark patch on one side which has since grew almost 3 times the size it was. Not sure what it can be especially in view that it is only on one side and fish feeds on nori very well.

In my tank I have had other tangs, yellow, blonde naso, purple, desjardini and a hippo, and aggression is the typical behavior between tangs.

I’m new to this forum, but would appreciate if you can enlighten me as to what this could possibly be.

The tank has been set up for 2.5years and parameters stable.

Thanks

 

[Jay Hemdal]

BorgD Welcome to the Fish Disease Treatment and Diagnosis Forum!

The #fishmedic team and other knowledgeable members of our community will do our best to help you resolve your questions. Please provide as much of the following as you are able:

• Brief description of the issue you are observing and answers to the following questions:
  • How long have you had the fish with the condition?
  • Did you quarantine with medication when you first acquired the fish? (If Yes, which medication?)
• Current water quality measurements
• Clear photos of the issue taken using WHITE light and/or a short video of any behaviors (post in your response or on YouTube).

If you can help us by providing as much of the above info as possible, it will make diagnosing and providing recommendations for treatment MUCH easier! The Fish Medic team will get back to you as quickly as possible. In the meantime, other members of our community may also share their experience with similar situations and advice that they may have regarding your situation.

You may also feel free to provide a more detailed description of the condition if you wish to share more info than the above list.

Additionally, these links may be useful while you await a response:

• CURRENT QT PROTOCOL LINK
• HOW TO ASK FOR DISEASE DIAGNOSIS HELP LINK

 

[vetteguy53081]

I have a Gem Tang which has been with me for 4 months now. On 7th April I noticed a small dark patch on one side which has since grew almost 3 times the size it was. Not sure what it can be especially in view that it is only on one side and fish feeds on nori very well.

In my tank I have had other tangs, yellow, blonde naso, purple, desjardini and a hippo, and aggression is the typical behavior between tangs.

I’m new to this forum, but would appreciate if you can enlighten me as to what this could possibly be.

The tank has been set up for 2.5years and parameters stable.

Thanks

Hard to see on my phone but appears to be bacterial and best treated in separate tank with seachem kanaplex which is easily absorbed internally and externally

 

[BorgD]

Hard to see on my phone but appears to be bacterial and best treated in separate tank with seachem kanaplex which is easily absorbed internally and externally

Many thanks for your feedback, will have to set a quarantine tank then as kanaplex is not reefsafe