Sour Diesel Fem - First Time

Girls are beautiful but high maintenance. I have struggled this week with ph, and two plants have calcium deficiency. Even at 6.8 adjusted tap water ph runoff was 5.5 -5.9. I'm sure the ph swings are causing the deficiency, Finally was able to bring up ph to most plants by tap water adjusted to 7.4, with half of normal feed, which gave me good runoff at 6.5. In two suffering plants, I used only 2ml Calmag in tap water adjusted to 7.4, which gave me runoff at 6.5. But, as can be seen, lots of different shades of green in that canopy. TDS meter just arrived so next feed I am going to again try half dose of nutes on the healthy girls, with tap water adjusted to 6.8, and test the runoff with the meter, see where it lands. Then I will have a better idea whether I am going to need to flush. Hoping to get this straight very soon, and consistent over next two weeks, and then flip. Oh yeah, also struggled with keeping canopy even, and I know that I will outgrow this tent. If I can start flower at end of week 9 (two more weeks) and manage the stretch for 2 or 3 more weeks, outside temps might be perfect for me to take some of these outside for the remainder of flower. I have no idea if that is even a good idea. If anyone is reading this and has experience at this, please let me know - I would appreciate any advice! More pics later.