flushing

does anybody know the truth about flushing with florakleen? some say final flush. some say flush with florakleen for a while... then with water. some say the opposite. I'm confused at this point. My plan is to flush with 10 gallons over 5 days (@8,9 or10 ml/gallon). i'm already 2 days and 4 gallons into this plan. growing in 5 gallons coco and hydroton.

I would use just straight water for a couple weeks and save your $$

I dont flush pre harvest...feed to chop