My fish is dying, and he's been lying on his side for a good 2 days. My fish has also been doing weird flips and not floating at all. I think his fins are hurt, so he can't float. He's not eating either. His fins are a bit black coloured. I've separated him from the aquarium, so that he won't affect my other fish. My other fish has black coloured fins too, and I would like to know why and what caused it. I would also like know how I can save the fish that is dying, are there any ways?
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