White Widow RDWC Grow

We are now into the 2 week of veg. I just did a water change with fresh nutes, Ended up with 500ppm. Might have overdone the CalMag a bit. I use RO water and I usually end up with a calcium deficiency....trying to avoid that this time. I also started using my GC-315W CMH light. So bright. I have it at about 36 inches above the plants and I am using the leds at 60% about 24 inches above the plants. Trying to avoid a whole lot of stretch so hopefully those heights are good. I am seriously considering topping both of these now. I think it would be a lot easier to manage if topped. They are so short and bushy I can't really bend them to expose any growth underneath yet. It is at the fifth node now, so I might be doing it later into this week. Well the system itself continues to operate flawlessly. The water change was so simple. Swapping out the 16 gallons in this system was easier than it was in the single 5 gallon dwc I was running. I also "ducted" my window ac. I have two hoses, one to cool the solution and one for the tent. The temp sensor for the ac gets it's readings from the tent and kicks on and off accordingly. Still some bugs to work out with that, BUT it is working. I have it rigged with cardboard for right now and hopefully soon I will be able to come up with a more permanent solution. I am having a lot of fun with this grow. Anyone have any input? Suggestions? Something you would like to see? Let me know. Happy Growing all. Update Day 18 from seed: Well I dropped the power on the leds to about 25% and so far they seem happier with them now. They really perked up from yesterday. My EC remains at 0.7 and my ph is steady at 5.9. I am pretty sure it's due to such a large system of water for only 2 plants. I'm sure they will be drinking more as the grow. But for the now the system remains in balance. I added some more pictures. They are really starting to look good. I also added an elbow to the waterfall in the buckets. I noticed the water was landing directly on the roots in the middle of the bucket. Not sure if that is good so I added the elbows to deflect the water to the side. Seems to be even more water agitation in the buckets now.