03-08-2012, 10:15 PM
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I kinda believe in giving them every oportunity... up to a point where I just don't think they can bounce back. She may be at that point, it sounds like she's barely holding on to life. I wouldn't blame you if you euthanized. If it were me, I would use the method where you catch the fish with the least amount of stress possible, and lower her head first into a container of cold alcohol (the strongest you can find). This can either be isopropyl alcohol (at least 70%, 90% if you can find it) or liquor (Everclear, etc.). Keeping a bottle in the freezer is a necessary evil when keeping fish. To me, this method seems to be humane, easy, and inexpensive- so its the method I use. You could read through the previous link for methods, and each method is rated by how humane it is.
If you choose to treat, I would separate her if you could. I would do daily 50% water changes. If the red you're seeing is from Hemorrhagic Septicemia, that can have viral or bacterial causes. You could try treating with a broad spectrum antibiotic, but only treat the affected fish. (We don't want to create super bugs by treating fish who don't need it.) That's about all I could tell ya for treatment. I'm studying different fish diseases, but I'm not the most experienced. BettaBaby knows her stuff, you could ask her.
Whatever happens, I wish you strength and peace!