White Glitch In A Sowrdtail Fish Tail

Hello !
I'm completely new here.
I am a beginner, I have a 180L aquarium with the following params.
PH ~ 7-7.2
KH ~ 7
GH ~ 14
Temp.: 24 deg. cel.
No2: 0
No3: 0
NH3/NH4 : <0.5 mg/l

All the 13 small fish are healthy and active.
but today I saw a white glitch on the tail of a female sowrdtail fish.
I managed to take a photo.
could somebody please tell me what this is and explain to me how to cure as I am completely new.

Thanks a lot in advance !

 

That's no problem, she most likely just nicked it on something

 

Thanks a lot

 

I agree that could heal by itself. If the whiteness grows it might have gotten a secondary fungal infection.

 

Your water parameters look really good - keep up with water changes to provide the cleanest water possible and keep an eye on it. I've learned that having a picture is the best way to tell day to day if it is getting worse or better. Best of luck and great observation. I know with 13 in the tank sometimes it's hard to see. Good for you keeping such a close eye on the fish in your care.

 

Good idea about the picture
Thank you !

 

Hey Guys!
I think the white spot is growing.
What should I do now?

 

Can you do another picture. At worst, you can't go wrong with water changes. There are medicines that you could use, but you want to properly identify the disease to use the correct medicine for the problem at hand.

 

I could get another picture.
she is still active and eating, but she lost a part of her tail now.

 

Correct me if I am wrong, but that looks to me like fin rot.

 

other pics.
may be it is a fin rot.. I don't know I am still a beginner .. but yes she is losing her tail ??

Hey guys !
so I went today to the aquaristic where I bought the fish.
I showed him the picture and he gave me the attached medicine to dose the whole aquarium. for 180l aquarium it will be like 45 drops for the first day, 25 for the second and third days.
After dosing it for today another fish got a white spot on her body!!
So am I doing something wrong?

Quick testing for water params. just now:
PH ~ 7.5-8
KH ~ 5
GH ~ 16
NH3/NH4 : 0 mg/l
Temprature: 26 deg.cel.