Need advise on infection on gills (Fire Goby)

[Weapon_Master]

All,

My beloved social wrasse passed away yesterday and the cause could not be identified. (It is definitely not attacked nor white spots now ich)

Noticed that my fire goby was hiding and not feeding this morning. When I finally manage to catch a glimpse of it, i noticed that the gills area are reddish in colour. Something is definitely wrong as it is usually swimming out in the open during the day.

Can any kind soul advise what could be done to save it. Thx

My water parameters are

Ammonia: 0

No2: 0.1

No3: 0.1

PH: 8.0

KH: 10

[Weapon_Master]

1 more thing noted is that its mouth seems to be always opened. This is adnormal.

Any kind soul can advise?

[FuEl]

It's your nitrites. Why are there still nitrites present in your water?

[vicky]

0.1mg is acceptable dude.