Update: So today Charlotte is 3 weeks 1 day into Flower. Watered her today 8/26 with 1&1/2 gallons with 5ml Calmag, 2tsp Big Bloom, and 1&1/2 tsp Tiger Bloom. PH 6.5. I also got to test my waters ppm today. So, tested my tap, and it's at about 175 ppm. Much higher than I thought. Tested water again after put through my filter, and holy shit, 7 ppm. Filter works really good. And I have been using current filter for at least 10 15 gallons. If I put a brand new filter in, it might go down to 0. We'll see, I won't change it until it reads over 15. Didn't get to test my feed water before I watered her, or the run-off. But I will from now on.
Also did a defoliation/lollipop. Plus some fan leaves up top that were blocking bud sites. I tried to space each cola out too, so they have plenty of room. She should respond well, there's now more light and air getting through. Looked at all the leaves I cut off, and inspected them, all looked good.
So here we are, basically at the end of transition/stretch, and ready to start making some actual buds! She's grown a little in the last few days. I'd say in all, through the stretch, she grew 1&1/2 times bigger. But didn't outgrow my tent. So that's a relief.
Here's pics from today right after I watered her.