Flushing with MG?

hello out there got a question if anyone could answer it would be great !

im using MG moisture control along with rainbow mix bloom just wondering if it is soppose to provide nuits for 90 days and the will only be in there 8-9 weeks how would i flush them and when? any info on this topic would be great

generally speaking, if you switch to plain water; the final two weeks before harvest, that usually is good enough if you have good drainage in your pots.