Being in their own tubs "seperated" is not quarantine.
Quarantine is when you bring in a new snake you put it in another room, you use seperate things to care for that snake, you don't share it's prey items or anything to do with that snake with any snake already in your established collection. Everything is kept strictly seperate. You normally would care for your established collection first, your snakes in quarantine last. If you have a snake in QT and then bring in another new snake into the same area, then you restart your QT clock on all of those new snakes.
Most people quarantine for at least 30 days but more likely 60 to 90 days. It's not uncommon to take a fecal float test during that time if there's any concerns about the possibility of internal parasites. Normally no snake leaves quarantine until it's judged fully healthy, is eating, shedding, evacuating it's wastes properly, etc.