Option A - Do nothing / wait
Option B - complete the coarse of treatement with Malachite Green
Option C - I'll probably ruffle a few feathers here, but I would cull the infected fish (humanely), do as big a water change as you can manage, and add some JBL Filterstart / cycle / or equivalent to the filter, and add charcoal to mop up any remaining meds - the theory being that you have removed the main source of the pathogens, as much of any contaminant that might be in your tank, and ensured that you bio-filter is functioning. Other than that, there isn't much esle you can do short of a complete strip-down and re-start.