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Damn, even without the toxic crap 300 for that is bullshit. Hope you got some vasoline and a kiss with that, or at least dinner and a movie.

Well, my white widow doesn't look too good, and I am thinking the pH is the cause. I flushed them a couple of weeks ago and lowered ppm, but that didn't seem to help. Then I got the idea to check the pH inside the rockwool. Am I on the right track? Also, this close to harvest is there even any...

No, it's by Botanicare

Growing in 6" rockwool, 6 weeks into flower in flood and drain. Every day I check pH in rockwool and it is around 5 (pH pen broke, so using drops). I up rez to about 6.5-7 to try and raise pH in rockwool each day. After flood rez is 6 and rockwool is 5.5-6, but the next day it's low in the...

Yes That should work. And if you are using distilled or RO water get some Cal-Mag+ also.

Good advice, but if they are Grodan you don't have to soak them that long, maybe a couple of hours. And NEVER squeeze rockwool. Just shake or sling the excess water out.

Hello KP, nice looking plants there. Good to see someone from the other site on here too. I have been a member there for a few months, but I found this site and it seems I might get a little more help here. This is my first hydro grow, so I need a lot of help sometimes.Anyway, I will be...