"2pods" wrote in :

The oldest of my SAE tribe (I've had him/her two years and is a good
5") has been laying on the bottom of the tank breathing fast.
Now the SAE also looks as if his lips are red and swollen, but no
fungus, rash, or spots.

Get quickly some more water movement there, because SAEs get just these
symptoms from lack of oxygen. It might be something else, but at least it
doesn't hurt to try this first.

Liisa