2x600w hps in a 1.5m tent

Hi all, iv been using a 1.5mx1.5m tent iv been getting decent weight but I know I can get denser buds, and less popcorn buds at the bottom. I hate trimming the popcorn it takes the fun out of trimming, we all love trimming nice fat dense nugs. So next grow i plan on using 1 600w m/h bulb for veg and adding an extra 600w hps for flower so ill be running 2x600w hps cool tubes. I plan on using a duct splitter so I can connect both extraction pipes from the cool tubes to one ducting pipe extracting the heat and smell. Also I want to scrog and lollipop the next grow so I can concentrate on fat nuggies.. does anybody else run 2x600w hps in a 1.5m x 1.5m tent. I also have always used the canna coco range what nutrients do you use? In coco