Is this Ammonia Burn?

[Aquarian]

You're welcome Ken
Angel does the semi-circle swoop to our Firemouth! I thought he was doing it because he resembles a neon more than anyone else in the tank - I read somewhere that neons are Angels natural prey. He's never even blinked at the zebra danios. I might take my chances and get some, because I love 'em - but wonder how welcome they'll be!
Hopefully Fred stays cool as the only Firemouth in the community.

 

[Aquarian]

On another note, the firemouth may well be easily chased away now, but in a few months you may find he is a bit more aggressive in return, and in a year or two will most likely reeking terror on the Angel, so keep a close watch as things develop.

Well so much for Fred staying cool He became progressively more aggressive over the past few days and I'm returning him to my LFS this evening because he won't leave Angel or the Bala Sharks alone all of a sudden.

It should be interesting... I got some neons. Angel was extremely interested and lunging at them in the bag but hasn't really paid them any attention since they've entered the community. Hopefully they're all here in the morning.

 

[Aquarian]

Shoot! Only one neon is left