Help! My fish has got really sick:(

[Fishylover2011]

Hi! I have treated my fish with 3 antibiotics as they showed signs of sickness( fatigue, fungus, swimming rarely, fins clamped down)
I have 2 blackmoors and 1 goldfish. Since the antibiotics I have seen slight improvement in the blackmoor but the goldfish is getting worse. I have done 50% water change every week and put new filter in. I also got the water tested and the readings were as follows:
Ammonia 0
Nitrite 0.5
Nitrate 40
Ph 7
Gh 11
Kh 9
Now the nitrite is bad level so I am putting in nitrivec everyday for 14 days.
Today I have noticed my goldfish has blister like things on each side gil. And now one side is red like it's bleeding. I will try attach a photo.
Please can someone tell me what to do nxt???
I am so sad and dnt know what to do. Would appreciate good advice xx

 

[Rosenweiss]

The better thing for your fish and your nitrites would have been to do large PWCs, especially considering this illness. That's what I would suggest.

 

[Fishylover2011]

If anyone could give me some advise i would really appreciate it

 

[Rosenweiss]

Your fish could be getting burns from the nitrite, so do a large PWC. Also, if you see fungus, you should use an anti-fungal medicine, not an antibiotic, which attacks bacterial infections. Try to feed mashed, de-shelled, boiled peas to assist in overall health and digestion, continue to do regular PWC's, and consider an antifungal medicine if you still see fungus.

 

[Fishkeeper88]

What is your aquarium setup? I will try to solve your problem based on some of my experience. I have had many aquariums and lots of different setups. Most of the time their are a lot of combinations that cause one singular noticeable change. I will need information about the setup and bio load. Also the latest water history and what things you have tried.