GOOD NEWS!
After 7 Days of medicating, Angle is now swimming in the 10 gallon at any level and no longer floats to the surface.
Seems to have been a bladder infection like I first thought. Although, constipation seemed a very likely cause as well because of the food I fed him and the others around that time.
Still no appetite yet but I think that will soon come. Tomarrow I will do a water change as I want him in the medicated water for another 24-36 hours. After the water change I will add some Stress Coat and start healing his external body tissue/scales and fins. I already have stress coat in the water but I also have meds and a tiny bit of Epsom Salts (1tbsp per 5 gallons)
I will continue to update. This would be the first time I have had a successful bacterial infection recovery.
Angle meant a lot to me since my other one that I had for years died during a power outage in the winter a couple years ago. I found this one at a pet store, whitish-gold just like my previous one for $5. I looked in my wallet, I had 1 $5 bill. It was meant to be. So I have to make sure he comes out of this all well and healthy.