Possible Uronema or ammonia burns

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Have had a lyretail anthias and two cardinal fish in quarantine for 2 weeks. Today I notice a 2 red spots on the lyretail, one on its belly and one on its side with a minor lesion. I’ve been treating with metro soaked food for around a week and a half. Ammonia has been low, but recently read 0.05 ppm. I did a water change today to lower ammonia. Let me know what you think it is. For now I’m going to continue treating with metro soaked food and dose metro into the water.

 

[Jay Hemdal]

Hi, welcome to Reef2Reef!

Did you drop a decimal on your ammonia reading? 0.05 mg/l is pretty low, and won’t cause burns. What are you testing with?
The lesion mid body does look like it could be Uronema, hopefully not, because we can’t get chloroquine which used to be one treatment that would sometimes work.
I have an article on Uronema posted here in the article section - search for “red band disease”.
Jay