Beginner grow Aerokit

This is the beginning of week 3, I haven't done anything except stick my head in there to make sure the pump is still running, easy work. the pump is running 24 hours and it loos like a cheap piece of poop if I am honest, I have a backup, but rather not experience that. the root system is looking very well established and the stem is strong, I am going to fim or top these babies and I am pretty sure they are feminized so I can leave them in veg a while longer then flip everything at once, oh sorry, I am germinating 3 auto purple lemonades and a few freebies I got from my suppliers in the aero tank, it can hold 8 and only has 3 in it right now, no point in wasting the space. I am going to have to leave everything in the aero tank until harvest as it would be a right pain in the arse to move the tank with plants into the tent. So each grow is gonna be one in aero and one in the coco. unless I find a better plan. I have invested in a Tds meter this week, see if it actually makes any difference, I use my ph pen every time I do a mix without fail and calibrate every few days, its nice to know what is going in and coming out of them, but it would be nice to know what proportion of nutrients they are taking up and see if I can tweak on future lessons. Especially as the growing medium is just water with nutrients, I currently have no means of monitoring the solution, however I seem to be winging it. not to mention the different products from various suppliers, its a minefield.