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Im about to start my first grow this week. Ebb n Flow. My questions are about adding nutrients to the res. 1.) Im assuming you follow the schedule that comes with what ever nutes i buy, but how often do you add more nutes? How can you tell? PPM meter? 2.) How often do you clean out the rez...

So I have decided to start my own Hydroponics grow.( ebb and flow). After a few days of lurking this forum and doing some research I almost have everything together. However I still have some questions. 1.)How high should my drain pipe sit? When the pump is running, how much of the...