pH pen came in this week - random chinese pen that came with some calibration sachets.
I found out that I had been watering at ~8.8 with water only and ~4.3 with feed 🤦♂️. Plant had started to get brown spots on leaves that I have since removed. Now using Manutec pH products from Bunnings to adjust pH.
Also managed to 'fracture' the main top while adjusting for LST but it recovered in a day.
Overall I think the plant looks okay and is starting to stretch out.
This is my first grow by the way 😀.