Okay, 2 tsps for the whole 2 gallons is okay since it seems like she may not have velvet. If her floaty problems get worse, you can up the dosage to 2 tsps per gallon (total of 4 tsps for the whole tank). I hope she feels better soon.
2 tsp per gallon or 2 tsp for the whole 2 gallons? If it's 2 tsp for the whole 2 gallons, you're fine. It also sounds like your girl may just have gold coloring, so the Epsom salt is a better treatment for her since she's floaty.
She doesn't look to have spots of stuff just like someone poured gold powder over her, she is floaty though so I had given her some epsom salt before I realized she was like that, She's floating in a cup in the 10G though because it's REALLY cold out and that's where the heater is
Rocky, for Ko, yes, warm clean water and 1 tsp of AQ salt for him with as many water changes as you can do. For your girl, I'd have to see a close up pic of her. Some bettas have natural gold coloring. With velvet, even though it's a gold dust, you can still see individual spots like parasites. To be, it looks more like a fish has been coated in corn crumbs than gold dust. If you can get a good pic, that would help. For now, try to keep her separate from the others and cover her with a towel or something so she stays dark.
Barry Bostwick was? Wow, I dunno why I thought he was some old guy and someone else played Brad. Oh! I know what. I was thinking of the guy who played Seymour in Little Shop of Horrors. That was Rick Moranis. So cool you get to see the original Brad Majors. Try and get a pic. :)