Thanks for all the comments guys! I only had one 6" net-pot-in-a-bucket-lid so one plant got that one, the other got a DIY hole in standard bucket lid. Figure since this is my first grow I could do a side by side comparison. So far I'm liking the 3" netpot drilled into the standard lid. The 6" netpot had to be hand watered everyday whereas the 3" one kept getting soaked easily. My water level is just about touching the bottom of the 3" netpot and about 1" into the 6" netpot since my rapid rooter on the 6" pot is a tad bit higher.
My water temp is a steady 66~68F, thanks to my chiller and my nute PPMs started at 400 a few days ago. Although I checked just now and its at 300ish, plants eating since last res change. I'll be raising the PPMs to 500 next res change. pH is always rising a few 1/10ths a day which is a good sign since PPMs are dropping every day (plants eating). I try to keep the pH between 5.5 and 6.2, so every time it climbs to 6.2 I add pH down to around 5.5 and let it rise over the next few days.
Today I topped off the res with 3 gallons of pH'd water + 400ppm of nutes. The system was at 400ppm a few days ago and went down to about 300 so the top off was set at 400ppm, this rose the total system PPM to around 340ish. Currently trying to find a humidifier as I'm seeing the low teens =[