Quote Originally Posted by Anonymousm0nkey
I'm thinking of doing a compromise here. I'm using RO water, so all it needs is two or three drops of pH down to get it just into the respectable range (probably get it to 6.6 or so), but I'm thinking of leaving out the cal/mag all together.

ByrdDog55 commented earlier in this thread that two weeks of flush wasn't necessary for hydro, but I'm going to try it out this time around just because I've used high levels of nutes this entire grow.

Any comments/suggestions on the final flush are appreciated, particularly on the use of Cal/Mag and/or pH during the flush.

2 weeks of flush is overkill! Period. One week with hydro is all you will need. Hence the reason your excellent hydro always leaves the nice white ash when smoked.

I always add Cal/Mag and PH...until I flush. At week #8 I start adding just ph'd water to the res. I do not add nutes again past this point. Week #9 is ph'd water. LOCK OUT IS IMMINENT if you do not ph the water properly...and you can fuck up your weight in the most important days...Get those bitches to feed and swell!