Generally the neons are looking thin - are they very young? What are you feeding them on?The one in the first pic looks thin
I do see a spec now. But have you added anything from the LFS lately? If the thin neon is 3 years old, whatever the problem is for the thin frame, it isn't killing him....
Ok I guess you know neons prefer to be in a large school then. Well it's possible it is ich, but can't be sure. Have you finished the GC treatment yet?3 right now I’m getting more soon and I got new fish 2 weeks ago and didn’t know about qt
During? GC should stay in the water for 48hrs. Then A water change, then redose for another 48hrs.
Some of the reviews say it kille dfish and was not safe for invertebrates
I'm sorry, but that doesn't answer my other questions. Aquarium salt is safe to use on a black neon but if you have m. blue, please try it first. That's all I can tell you with the information I've been given.It’s a black neon and it’s bad