You can frag those colonies but you’ll still have to dip/inspect/fallout from DT so you may as well do the whole colonies. If you were local I’d say come on over my QT systems are open! I recommend Bayer for the process as it is cheaper than alternatives and works well. Doesn’t kill the eggs but neither do any of the others. Also yes your QT Rubbermaid will need light...great light...maybe? I try to keep my QTs as close to my reef as I can so I can just carry them over and drop them in my DT. Either way good luck with the battle ahead!