Stretch seems to have stopped. She's looking healthy, and buds are starting to grow significantly.
She's also drinking about 2-3L per day now.
Day 73 - 21F - Added SubCulture B (1/2tsp in 23L res)
Day 75 - 23F - PH is up to 7.1. I adjusted it back down to 5.8, but 5 hours later it was back up to 6.5. Going to monitor it but might do a full res change again.
Until I added SubCulture, the PH was always steady at 5.8 with very little adjusting required.
Last time i added SubCulture (way too much by mistake) the PH fluctuated by ~2!!!
Day 76 - 24F - PH was 6.4 after light's back on, so I think the SubCulture just had to balance itself. PHd back to 5.8, so I'll see if it evens out or jumps back up.
Day 77 - 25F - PH back to normal after light's back on (5.9).
Day 80 - 28F - Res Change - 20L of water, 37.5ml A/B, 20ml Superman B1, 20ml CalMag. Not using SubCulture B