First Grow ever, Random Seeds

Watering about 400-500mL per Plant every second day. Still with 1mL/L TNT every second watering. Got the exhaust fan connected and running at the start of this week as well, so there should be better humidity control and better CO2 influx. Thought about calculating how much CO2 would be pushed into the tent through the 10x20 intake opening by simple osmotic pressure, but just flicked the switch because the fan needed to be running anyway so why bother. Also not too sure about #1 and #3 possibly being the same strain anymore. Their Leaves started to look a bit too different over time. Planning to have them in 18/6 for at least another week, since I want the majority (so the smaller #1 and 3) to be a bit larger before switching. I got 1.4m of height to work with. That wil let me fit 90cm of plant in there, probably even 100 in a pinch. Maybe the larger #2 will run into trouble there, but we'll see. Dont know any plants gender yet, so I cant plan ahead anyways. Next time I'll definetly get some quality seed and only do a strain at a time. Height from substrate started and finished this week as follows: #1: 23cm -> 29cm #2: 39cm -> 47cm #3: 27cm -> 33cm