Yup, sadly, she's gone. I buried her beneath my weeping cherry tree. It was a short time but I knew when I brought her home that it was a long shot. I wanted to save her but realistically I just wanted her to be able to die in dignity in clean water, not forgotten on a Wal-Mart shelf and tossed in the trash.
I had actually never seen pineconing in person until I saw her, poor thing. It's truly sobering to see those scales stick out so far and to feel them if you touch the fish. I'm sad I couldn't save her but glad that she's at peace now because she had such a hard time breathing near the end. She couldn't rise to breathe even though I lowered the water right to her snout so I lifted her up.
:/ I say again, Wal-Mart shouldn't keep bettas stacked on their shelves like they're cans of soup or something.
Thank you so much, DarkMoon for all your help, especially with the dosing and medication advice. And thank you everyone for your concern for this poor little betta girl, I appreciate it.
The people on this forum rock.