things are looking great for you, you can flush and if you use ice cold water you would shock the roots and get cool color fades with those strains, or just flush.
they have done research not to long ago stating that flushing really does not matter since most nutrients are organic.
i have tried the no flush way when i read that and i did not notice much of a difference except i did not get color fades, you see i have been at this for over 15 years, now years ago it was
more under studied and we flushed because of the chemicals and nutrients we used.
so if you used more chemicals in stead of nutrients you would need to flush.