Red Kush Auto

DAY 37 The plant is getting huge and started stretching pretty fast. I keep LSTing it, but I think I will already leave the main cola alone and let it grow by itself, only LSTing the side colas. There are slight signs of phosphorous deficiency on lower leaves, but I think that'll go away if I keep the water PH around 6.6. Watered it today with around 3 liters of plain water PHed to 6.6 until runoff. Runoff PH was 6, which is way better than 5.4 from the last time, and runoff PPM was 450, which is perfect. DAY 41 Watered it with 3.5L of water today with nutes, PHed to 6.5 and PPM 880. The weird thing is that the runoff PH was 4.9 and runoff PPM was 1900. This also happened before and both to this and to the other plant. Hopefully it won't show on the plant as it's growing really well and huge. What am I doing wrong? Is this about this strain? Let me know in comments.