GROTEK - FINAL FLUSH (REGULAR) - 4 LFINAL FLUSH FERTILIZER RINSE SOLUTION Final Flush is formulated to remove excess salt from growing media to ensure a cleaner tasting harvest. Plants tend to absorb excess nutrients and store them in plant tissues. By purging nutrients from the root zone, plants are forced to convert accumulated salts into secondary metabolites that improve harvest quality. The result is a top quality harvest with the flavour and aroma you expect. Application Rate: 1L