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Just to clarify, my system is basically like this http://www.datazap.net/sites/420hempire.com/killergreensystems/6plantsystem1.jpg

Okay - I've grown pot before, but this will be first time trying hydroponics. I'm going to try deep water method with a 4 gallon reservoir using fox farms grow big My questions are the following - 1) What is the PH that i should aim for? I THOUGHT it was 5.5 but now I'm seeing different...