quarantine tank

Planning to add more fish to my aquarium, but I want to do it properly and give them a quarantine period, as the pet stores always have some sick/dead fish in the tanks so I worry about disease (even though I avoid buying fish from any tank that actually has sick or dead fish in it, I know they often share water systems). So I've set up my plastic bin as a temporary fish home. It's very minimal, but if I need to use it as a hospital tank that's preferable.