Why is my goldfish floating, losing scales, and has bloody fins?

Question

My goldfish has blood in his find. I searched what it could be and found a website that took me it was ammonia poisoning or something and I just needed to clean his tank. He's 8-9 years old and I got him from Mejier. I came home from school today to find him floating on his side. He let's me reach in and grab him and I noticed that his entire back side from his anal fin to tail was losing scales. He is in a 20 gallon tank with another goldfish, 2 plecos, and an albino shark. He has a filter+air. Pet's info: Fish | Gold Fish

Todd Cecil · Accepted Answer

Thanks for reaching out about Kitty and including pictures. It does appear as it a trauma occurred to the fin, Secondary infections could surely be from the water column. Ideally, Kitty should be removed to a quarantine tank. Non-iodized salt can be added at 1 Tablespoon per 5 gallons for 3 consecutive days, to gradually build up the salt concentration. This will not provide an anti-bacterial level of salt but will help osmotically. Antibiotics should be used to treat the infection. These are best administered through injections but a veterinary visit would be needed to prescribe medications. Parasitic infestation can also lead to dermal erosions. Any new fish, invertebrates (snails) or live plants added in the last several months could be a source. Good luck.

Why is my goldfish floating, losing scales, and has bloody fins?

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