Mimosa Evo RDWC

Hi folks, It's day 2 of week 2. The plants have established themselves nicely. One plant is 9" in diameter, two are 8" and the smallest is 7" across. Day 1 of week 2 I increased the lights to 50%. I also installed a temp/rh combo controller and additional humidifier so I can try and maintain ideal VPD. Day 2 the roots of the smallest one reached the bottom of the 8" net pot. I drained enough water from system to lower the water level to just kiss the bottom of the net pots. I did NOT do a resevoir change this week. They are so small (essentially still seedlings for another week) they aren't putting a dent in the nutrients available. It would be a waste of nutrients and needless work. I'm running a chiller and using bennies so it won't be a problem going 2 weeks without changing it. Will do a change for start of week 3, and lowering the water level to about 1.5" below the bottom of the net pot. I refreshed the bennies and I also added a low dose of cal mag as week 1 i only used base nutrients and bennies. This brought the EC up to .7 (450 ppm). I do NOT use RO water but my water is relatively soft at about 100 to 120 ppm. The mineral content is so low I have to add salt to the water in order to use my steam humidifiers.