Day 64 - switching light to 24 hours/day
Reservoir refill, in 20L:
Megacrop A 15g
Megacrop B 9g
Epsom 6g
Gypsum 6g
Sulfuric acid 7ml
Day 68 - supplemented liquid calcium manually and refilled the tank as day 64
Your plant looks great. I’ll follow along. I have the 3 of the LZ that are 8-9 weeks old and still have 3 weeks or so to go. They were stunted because of issues I had. The smoke on them however is killer. I also have 2 LZ plants that are dialed in at 37 days old and doing very well. Check them out if you like. Happy Growing!