It takes about 24 hours for them to dry down 10% rn
and youve already got them on the slabs? If thats the case youre probably good to go.
Below are my current mums in 4x4x4 deltas. Theyre in a 2x2 tent with a 100w spider farmer
above at maybe 20-24". I have to feed them about once every 2 days till runoff and if i leave them any longer they will dry out completely within another 24hrs. Theyre at a point where they drink enough that i could put them on a timer and feed 100ml or so every 2 to 3 hours and not have too much runoff. I dont really care about dryback at this point as the plants will ease into that on their own as they start drinking more. Most important part is they dont dry out completely, so I have to keep a close eye on the weight of the cubes and slowly increase my feed timers, or frequency in the case of the mums, to maintain the wc as the plants get bigger.
But its a bit more accelerated for me in my flower room because i use clones and push them with high light very early.
Oct 1st - clones freshly transplanted to the deltas
Oct 15th - first day of flower
Oct 30th - after stretch and defoliation
This is under a 1000w hps running at 600w to start, then 750w on first day of flower, then 1000w after stretch. By the time stretch was over im about 18 inches from my HPS, they stretched a lot more than i was expecting. This last one is about a week or 2 before harvest
The mums I have in the 2x2, wont ever get more than one feeding per day, to runoff. Its not ideal, but the plants adjust their growth to match the feeding schedule. The plants on the timer i just feed till runoff manually, count the number of seconds till run off and then set every feeding to that time, so at first it gets runoff at each feeding. But it gets less and less each day until there is no runoff on the first and maybe second watering of the day. Thats probably around the time where i flip to flower and then they really take off and sometimes i have to almost double my feed times over the period of a week or 2. Then after w2 flower, i defoliate and have to drop my feed times again because of both shock and decreased transpiration due to the lack of fan leaves. Within about 2 or 3 days they start feeding normally again and i have to increase my feed times again.
Your sensors do all that work for you, assuming your triggers are set. You could almost leave them on autopilot and just keep refilling the res. Adding the slab might actually be a good idea until youve finished a grow or 2 as it acts as a safety net. So if your pumps break or sensors stop working or something, you could miss a few feedings and the plant wont notice. In my case with the deltas, I accidentally left my pump unplugged after changing the timings, had to manually feed to an extended period just to refill the cubes, then did it again the next day. The plants definitely noticed lol, and it wasnt long after that i started seeing nutrient burn on my tips.
You should post a pic or 2 with each update. Everyone likes seeing pics and it allows others to maybe spot deficiencies you might have missed. The last pics you posted look good though, youve got nice strong looking stems and the plants look healthy enough to me.