Bloody Goldfish Under the Scales?

[falut]

I have had my common goldfish for about 4 months. He is in a 10 g tank. with one other recently obtained common goldfish (I got him 3 weeks-ish ago) as a companion. They are about two inches long from nose to tail. The goldfish with the problem is slightly larger.
At first both seemed to lose a few scale but nothing horrible.

A week ago I noticed blood on the larger goldfish's chin. The blood was on the inside. He seemed perfectly happy and when I looked it up online decided he may have tried to eat a rock.

Yesterday I noticed two very large angry red spots (looks like blood under his scales) where the body and tail connect. One patch on his back and one on his belly.

I took him over to the pet store. They did not know what it was. He is still extremely active.
I decided it may be Costia.
His "internal bleeding" started to spread.
I got some medication and put in the recommended amount.

4 hours later the "internal bleeding" is still spreading.

I walked into the room and saw him resting on the gravel. As soon as I came up he started swimming. He is trying so hard but I don't know what to do.

His condition is worse. instead of a "rounded back" it is straight lines. his back end seems to have lowered or shifted somehow.

ph 7.6-8
Ammonia .22
Nitrite 0


Help?


Picture by him (yesterday) now it is extending everywhere.
Sorry he is not photogenic

 

[jlk]

Welcome to AA!!!

Can you provide some more information so that we may be able to better help you?

What exactly are you testing your water with-liquid or strips? Do you also have nitrate levels? Can you also provide the numbers for your tap water? What is your water change schedule (%/#wk)? Are both fish afflicted with these symptoms? Thanks!

 

[Delapool]

The photo doesn't seem attached?

 

[falut]

I used liquid. I did not gather enough water to test for the last (I think nitrate it could be nitrite; the one i previously did not mention). It seemed the least dangerous out of ammonia, nitrate, and nitrite.
The other fish is not exhibiting any signs like the one with the "blood".
I do 25-50% water changes weekly depending on the waste