ok guys, I've used coco on 3 previous grows but I've had pH problems due to lack of a ph meter, which I now have, and I never flushed, my setup isnt anything special, I have a 400W HPS, I use Canna Coco A+B and GHE micro nutes and a little 13/14 during flowering, If im growing in 2-1/2 or 3...