Fast Buds Testers FF 6 - Mostly Sativa

Plant was flipped to HPS and a 12/12 schedule on 1/20/20. Plant was watered on 1/23/20 with 2.25 tsp Big Bloom and 1.5 tsp Tiger Bloom, followed by 1 gallon plain water feed on 1/26/20 which actually turned out more like a mini flush accidentally as I would have preferred not to have as much runoff as I did (around 50%).Continued with LST where possible but this is the point where I am going to let her begin to stretch as opposed to spreading it out and keeping it wider. Plants appear to need more water than previously as I think they would have been better off two days apart as opposed to 3. I notice that the substrate is not holding water very well and I think between the increase temps in the room and the stronger light, they are drying out much quicker than I anticipated. Next feed will be a full strength flower feed and I am anticipating a 2nd defoliation at the end of week 2. In terms of the runoff previously reading so high, turns out the pH pen has been having issues jumping between reading in the 6 and reading in the 8 range. For example, I had to calibrate it twice in one watering session alone. This is concerning in terms of knowing what the actual pH going in was however, I have seen no signs of issues of lockout and so I believe the pH out was the only thing reading off. The runoff from the 1/26/20 watering was around 6.7.