half circle patch on fish

[nono]

Hi, i want to ask for tips from you guys. my friend have a 13 cm black ghost knife. she put it in 120 gal or so gal for now with a 12 cm parrot cichlid, 7 cm clown loach, 7 cm redfin shark, and 16 cm tinfoil barb. about 3 days ago, on its back there is a half circle mark that consist of small white dot lining to form a half circle. At first i suspect maybe it is a bite mark, but then i realize there are no fish in the tank that able to make such mark. Could it be related to nitrite level or a fungus related problem. Can i have some suggestion about the problem and how to cure it?

 

[tlindsey]

Hi, i want to ask for tips from you guys. my friend have a 13 cm black ghost knife. she put it in 120 gal or so gal for now with a 12 cm parrot cichlid, 7 cm clown loach, 7 cm redfin shark, and 16 cm tinfoil barb. about 3 days ago, on its back there is a half circle mark that consist of small white dot lining to form a half circle. At first i suspect maybe it is a bite mark, but then i realize there are no fish in the tank that able to make such mark. Could it be related to nitrite level or a fungus related problem. Can i have some suggestion about the problem and how to cure it?

If possible please post a pic it will help.

 

[nono]

ok, i will post a pic of it tomorrow. please check this thread soon ...

 

[nono]

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[nono]

 

[nono]

The mark is on the back. Do you guys have any suggestion?

 

[kno4te]

Kind of looks like it tried to wedge itself on something. Would keep the water pristine and watch.

 

[Charney]

looks lke irritation to me. Check the water quality and make sure no ammonia or nitrite. If water is good just keep a watch on it.

 

[nono]

Okok. Thanks for the info you guys.. i will check it then..