From my reading about dong hydro, everybody flushes the last 2 weeks with just water. I was at the hydro store today, and was recomended "Sugar Peak Grand Finale 0-6-4) Which says its to be used in the last 14 days up until harvest. I also got KoolBloom Ripening forumula which says to discontinue 3-5 days before harvest. Do any of you guys use this stuff during the flush stage? Or should I stick to straight water? I saw a lot of products that were designed to help ripen during the flush stage.