CBD Blue Shark x Wedding Cake crossbred

First day of flower! They've both been really thirsty over the last week of veg and the pH has been all over the place. I honestly haven't been messing with it that much even when the pH swings, and I've just been changing out the buckets once a week. Sometimes the pH is 3 on one plant and 8 on the other. It's wild. I'm going to keep a closer eye on it now that I've changed to flower nutrients. The smell is already pretty intense and the stalks are nice and big. They've been blowing up since I put the HPS light in, now that the light cycle is changing they're going to go nuts. I'm stoked. I'm a bit worried about the cold temperatures at night, especially with the light being off for longer. I did some defoliation on the last day of veg just to get rid of some bigger fan leaves up top and some shoots down below.