Whats this and how to treat?


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I notice a slight redness above the eye few weeks back but didn't really think much of it. Now there seems like tissue had dissolved away. Inside there is some white stuff on the surface. What exactly could this be?

I have Medifin, salt and Melafix in the cupboard.
What do you think i should do? Take him out of the tank and treat separately or treat the whole tank?
 

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Hi Magzire,
First thing is to establish what the existing water quality is.
Have you done any tests? If so what are the test numbers?
Next, have there been any recent changes or additions to the aquarium?
 
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Hi Magzire,
First thing is to establish what the existing water quality is.
Have you done any tests? If so what are the test numbers?
Next, have there been any recent changes or additions to the aquarium?
Thanks for the reply Mitch, with NTLABS test kit it reads :
NO2 - 0.25 to 0.5
NH3 - 0
pH - 8

I did add 4 small red caps around a month ago, they seem fine though. I do 50% water changes every 4 days using Sodium Thiosulphate to dechlor. Tank has been up a year now and never had issues, running two fluvels 106's.

So any idea what is attacking its eye? Some sort of parasite?
 
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NO2 as in nitrite?
You shouldn't have any positive readings for that. Have you had any ammonia spikes from decaying organic matter recently?
Can you think of any issues with your filtration system?
I don't think it's a parasite problem.
I'm not a fan of water changes, is there a reason you are doing them?
 
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Well there is no plants in the tank to absorb nitrites, i find it hard to keep them down. I tried but the goldfish just destroy anything i put in there.
 
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Greetings Magzire! Please let us know how large is your aquarium? I agree with Mitch, it sounds like a water quality issue. More than likely, your fish is ill from over crowding. Your tank and filtration are probably not able to handle the sudden addition of four, heavy waste producing fish. Nitrite (NO2) should always be zero. We are here to help.
Stephen
 

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