Sweet Seeds Black Jack - Newbie DWC

Thanks for taking a look! The Pruning Supervisor gets a treat for every like this entry gets 😁 (F numbers in images = days since flipping to 12/12) I've been calling her Bush Jack now😂 She's doing well, consistently growing ~0.5" (1.27cm) per day this week while stretching. Setting up to grow some real dense inflorescences. Still pruning here and there removing small branches and trying to keep fan leaves from blocking bud sights but... I have no idea what to do with this plant. Unless I don't like the bud i'll be growing this strain again in hopes I get more phenos that grow like this so I can learn how to do it right. D49 - 10" (25.4cm) tall D50 - didn't measure D51 - 11"tall D52 - 11.5" tall - adjusted LST a bit - - res change to flower formula (see image) D53 - 12" tall D54 - 12.5" D55 - 13" (33cm) **Issues** -My previous bud-set formula was not dialed in, not bad but I THINK the thinner, slightly yellowing base of new growth was a phosphorus excess antagonizing iron uptake. Should be fixed with flower formula? or when she settles down? waiting to see -Pruning, what the hell do I do with this bush? The nodes are SO tight than fan leaves and branches are just coming out everywhere, and a lot of branches are just not worth keeping. I left way too much on during veg, I know that for certain now. -Lights, I've been holding back light almost the entire grow now trying to get her to grow longer internodes... That didn't really work, it has be time to start blasting her soon right? maybe when her stretch starts to slow? or after a bigger defoliation next week, *shrug* -Need to get accurate white-balance set up for photos, new growth is an issue but isn't nearly as yellow as pictures. -Red petioles, not an issue just an observation. I had a little bit starting out but haven't seen much of it this run until now. Only effecting some of the tops where she's getting the most light so pretty sure we're good. **Nutes / pH** -She was slurping up EC 2 bud-set solution like a champ, Res even dropped to EC1.9 a few times before top-off. With the new solution and less leaves the res EC is increasing a little bit as she drinks. Going to target ~EC1.8 -Is this still and iron deficiency? new formula doesn't seem to be helping, not going to do anything drastic yet but will monitor. Maybe spike it with a little GH Micro since I want to avoid more phosphorus. -Anyone use nitric acid in DWC? Looking at getting 500ml of ~1M I took an educated guess on the available P from pH down, seems to be right to some degree now, which means I'm basically always going to be pushing higher P than I want. Been thinking I would like to have the option to adjust using half phosphoric/half nitric to give me even more P breathing room, there's plenty in the 5-12-26 and the extra N means I don't have to step up calcium so hard. **Training/Lights** -Lights are 85% @ 16" estimate DLI~ 37mol Other plant is starting to realize there's more light to have if she grows over this one 😑 I don't want to scorch that plant and would love this bush to stretch up a bit more so, there's been reduced light for nearly the entire run so far, thinking that was not the right call. Either way, full send when the stretch is over.. -Tweaked LST slightly but I think that's about all I can do as far as spreading, main branches are now quite hard and packed with nodes.