My friend can no longer care for her betta fish and is now taking him to me as her last option as she’s moving and his health is declining. He has bad fin rot, and is over a year old. She’s giving me all his tank supplies, which includes a 6 gal tank. I was wondering any alternatives to fin rot treatment besides bettafix as I’ve heard some bad stuff about it. And anything I can do to help with stress during transportation, I’m driving up to her city today to pick him up. We are going to put him in a small 2-3 gal holding container for the car ride, but I’m worried the stress will be too much.