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I can't seem to figure out whats going on here. Started EC at 0.2, 5.8PH, they started showing signs of what I thought were being hungry, so I upped it to 0.4EC. Within 24 hours they'd gotten drastically worse so I cut it back to 0.2EC, 5.60ph and the problem still continues. Surely I can't be...

I'm a little confused about grounding this light that I'm currently building. I keep seeing pictures of people connecting a wire to a screw on the fixture or something but is that step necessary if the LED driver has an earth wire and the wall socket has a ground plug thing? I can't remember...