Gorilla Glue #4 SFV OG (Third grow)

- Monday - I've started training. I like to leave the tops grow a little before beginning lst so that they arent as delicate and easy to completely tear off by accident (memories of the yield impacted from last time when I damaged half the plant haunt me!) Leaves looking a little darker than I'd like. I find the Advanced Nutrients line very N heavy as it's in every bottle. It doesn't help that growing in coco requires calming and that almost every calmag seems to be 4% N. No tip curling yet so not too toxic, just a dark green. - Friday - Tips are starting to curl so I'm going to have to address this Nitrogen toxicity issue prior to flipping to flower. Topped the 2 top shoots. 4 branches total now so it looks like I'm mainlining. One more topping to get to 8 branches before I flip. So it gives me time to fix the N issue. - Saturday- I found one of the tops from last week had fallen I'm the coco and started to root! Through it away as I didnt want it interfering with the main plant and I had pulled it up before I knee what it was! Reduced the calmag by half and the AN grow by a third to try and reduce the N intake. Why is it so difficult to find a zero N calmag?!!! Watered and noticed the runoff was 6.9. Went a second time with 5.8 in and it came out 6.9 still. Very worried about that. Seems odd. It's also 'eating' less than the other plant I've on the go at the moment. I know N toxicity slows growth so maybe that's why? Perhaps the plants mechanism for slowing N intake is to raise pH as it 'knows' it has enough? Too tired to mix up another batch so I'll flush with plain pHed water tomorrow before feeding. - Sunday - I've noticed alternate branching for the first time in the plant. Final topping completed. Flushed to reduce salts, bring down pH and help rectify Nitrogen toxicity issue