Week 6 Reduce Ppm And Floods ?

hi im in week 6 flower growing in hydroton . flood and drain style . ive reduced ppm to 600 cause they are done in 2 wks , do i have to reduce flooding ? currently i flood 6 times per 12 hrs , any help thanks

bump.......

I don't change my flood schedule ever...I actually keep my nutes to the max til the last week of flowering. Then just flush with water for a week...I've also done this then used GH's Flora Kleen on the last day, just to flush all the salt away. Bud smoked great with no taste of nutes.