I have 4 SAEs, 2 of them have red lips and a slight reddish tinge on their fins. I didn't thing much of it, thinking it was some sort of colouration. However, today I found one of the 2 dead, hence it started to worry me.

Don't really know as to whether it's some infection of some sort...I also kind of noticed the same reddish tinge on the nylon string used to tie down the moss on the log of my fish tank.

specifications:
2ft tank, 60L
17 Neon Tetras
10 Cherry Barbs
8 Zebrsfish
CO2 3 bps
Lighting 55W, 6hrs a day
Temperature 26.5oC

on alternate days doesed with:
Seachem fluorish excel
Seachem iron

twice a week: seachem fluorish trace

Once a week: Nutrafin plant gro NPK