Mysterious Anglefish Illness

[Kenpachios]

Hi, though I would try the online forums for once as I need help to treat an angelfish.

Short Story: Angelfish hovers at surface, does not move or eat. No visible signs.

Long Story: I recently purchased 2 angelfish from the LFS. After introducing them to my community tank one starts acting strangely; hovering at the surface in one location, breathing rapidly and not eating. The only visible sign is a singular protruding white spot the size of a grain of sugar on its side. I put it in a quarantine tank and the next day I find it has died. Now the other angelfish is behaving in the same way however I am unable to see any visible signs (it is white). Any advice would be appreciated as I would like to save this one. Cheers


Water perimeters:
Nitrite- 10ppm
Nitrate-NA
Ammonia- nil
Temp- 26cel
pH- 7.2

 

[micko]

Tank size?
Tank mates?
Angel fish size?

 

[Kenpachios]

Tank size?
Tank mates?
Angel fish size?

200ltr
10 danios, Red Tail Shark, 2 other angel fish, peppermint catfish, 1 clown loach
Angelfish are a bit over an 1 and a half inches long

 

[ZoddyZod]

any signs of string white/transparent faeces?

 

[micko]

Was there any bullying going on? The other two angel fish, what size are they? I know angels can be quite aggressive when other new angels are introduced.

 

[Kenpachios]

No odd feces that I could find anywhere and no bloating either

They all seemed to be getting along fine, no chasing or anything. The two other angel are of a similar size and are very active and healthy.

 

[ZoddyZod]

acclimatization method used?

any idea on the different in pH between LFS and your tank?

 

[Kenpachios]

acclimatization method- float the bag from LFS, gradually add in aquarium water then after a while net them out of the bag and add to tank. No idea on the LFS pH though...

 

[onidrase]

10 nitrIte, or 10 nitrAte!?

Nitrites are deadly to fish, if you have 10 ppm, I'm surprised you still have fish living in that tank. Also, just for a heads up, clown loaches need to be kept in groups of 6 or more in very large tanks. Watch your clown loach for signs of ich. They get it very commonly, especially when they're being kept alone.