That would definitely be a parasite, but I'm not sure if it's a nematode or flukes. My first guess is that it is a couple nematodes because they are hanging from the anus. Try the one of the treatments listed. I hope it gets better. Keep me posted. I will also promote your post to a hot topic so if anyone else has successfully treated what you are experiencing, then they can help you too.
Freshwater fish diseases

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Phishie

"An ounce of prevention is worth a pound of cure."