Okay, I changed Monty's water with the Amquel + in it, but I made the BIGGEST mistake ever with the water change. I'm so embarassed about my stupidity, that I won't even tell you what I did, except now I've just added to my betta's sickness. Ugh!
As for his other symptoms, I'm thinking he's got something fungal going on (it's pretty evident on his body), and not to mention the chronic fin rot is at it again. I'm thinking that the extreme heat wave that we experienced this week put him under a lot of stress. I was anticipating he'd get better as the tank got back to normal conditions, but no. I had extra Kanacin from my last fish, and I was preparing to start medication tomorrow, but realized that this wasn't quick enough.
He's been in trouble before with his health, and acted a lot like he is now (lethargic and hanging out on the bottom), but he's pulled through a couple of times before. Maybe even with the mistake I made just now, he'll pull through again. He's pretty tough. Then again, he's pretty old, too. We'll see.
Thanks for the help!!
-Amy