Well, as I suspected, Zeke didn't make it through the night.
I was keeping a half eye on him, though I don't know why because every time I saw him it made my heart break. But, one time I checked on him last night, there was no doubt - he was upside down in one of his plants, and his color was almost completely gone.
Rest in peace, Zeke. You had a good long life and I hope that it was a happy one for you. I sincerely hope you weren't in any pain, and that the end came quickly for you.
I'm going to miss Zeke, and having a beautiful fish, and the tank in our apartment. It provided emergency lights sometimes!