Help. New thing on fish what to do?

[mckinleyw]

Please check out these blurry pix and help me. 1 of 3 blue green chromes has a bad looking spot. Ive tryed to see if i could catch him but didnt want to disturb too much unless necessary. Any thoughts would be helpful water quailty is ok. Fish only. Salt 34.5 ppt, ammonia is 0, nitrites 0, nitrates high(idk how high). Ph is low, its in a room with not much o2 exchange. Idk any calcium,mag, or alk.

 

[vetteguy53081]

Please check out these blurry pix and help me. 1 of 3 blue green chromes has a bad looking spot. Ive tryed to see if i could catch him but didnt want to disturb too much unless necessary. Any thoughts would be helpful water quailty is ok. Fish only. Salt 34.5 ppt, ammonia is 0, nitrites 0, nitrates high(idk how high). Ph is low, its in a room with not much o2 exchange. Idk any calcium,mag, or alk.View attachment 3124929View attachment 3124931View attachment 3124936 View attachment 3124945

AS you stated- pics blurry but appears to be a result of nick or injury to fish. Really need clearer pic to fully confirm. Keep an eye on it for any new development such as bacterial or reddening.

 

[Jay Hemdal]

Is it on the fin? Did it grow over time or just show up this size? It could be an injury if it showed up all at once. If it is on the fin itself and grew in size over days, it could be a common viral disease called Lymphocystis.
Jay

 

[mckinleyw]

It appeared suddenly. Im thinking injury. It seems to be healing ok. Thank you all for the responses.

 

[Weeb]

Good that the fish is healing.

Always provide good foods with supplements noted in the Fish Nutrition post.