Big Red Bruise On The Side Of My Goldfish

Hello,

So I have this HamanashikI GoldFish (a Pearl one) and, from one day to another, a big bruise on his side appeared.

At first I thought it was just a bruise but it has started to get redder everyday.

A friend of mine recommended me to put Blue Methylene directly on that side just in case it was a kind of fungus so I did and something that looked like cotton falled down. Neverthless, it didn't do much for the bruise (I did it twice).

I started to read about it and there was some people that said it is a bacteria and that is probably an ulcer so I looked for it online and it is not as bad as those pictures.

The fish looks completely healthy and normal. He swims normally, eats normally, behaves normally... it's just that bruise alike stain that it has that's bothering me.

Parameters:
Ph: 7.5
Nitrates and Nitrites = 0
Tank Size = 200 liters (I have 4 big Goldfishes)
Cannister Sera 1100
2 oxygen difusors stones

Every help will me much appreaciate it. Thanks you in advance.

 

Hello!

I'm sorry you goldie has an issue!

Could you provide a pic? With these guys, it could be a number of things because of how they are bred and the environment. It's hard to go off just a description. Also, do you have tankmates/decorations?

 

Hello!

I'm sorry you goldie has an issue!

Could you provide a pic? With these guys, it could be a number of things because of how they are bred and the environment. It's hard to go off just a description. Also, do you have tankmates/decorations?

Sick Hamanishiki

• Hasum
• Jul 31, 2017
• 1

Bruised side

This is him, as you can see, his side seems to be bruised.

 

Just to make sure, the circled region correct? (Sorry for stealing your photo!)

 

Just to make sure, the circled region correct? (Sorry for stealing your photo!)
View attachment 338880

Yes, exactly there. As you can see, it is kinda redish purplish or something like that

 

Hmmm...looking at the worst, it may be an internal bacterial blood infection, BUT
it looks to be some sort of physical trauma; do you have any decorations in the tank or other fish (like a sucker fish of any kind?)

How big is the tank?

It may also be stress as well; where did you get him? And do you know about the nitrogen cycle?

 

It really doesn't look like bacteria to me. If you hadn't told me it appeared suddenly, I'd think it was just part of his coloration. But I would still increase water changes and see if that helps. Then try something mild like melafix.