PH still completely fine. All I've needed to do still is up it slightly with baking soda dissolved in water when I add nutes, or top up the res. making it drop slightly.

Plants are really exploding. At least 2 to 3 inches growth overnight. One branch from the third node is now taller than the plant tops lol. It's opposite branch is quite a bit shorter due to being on the outside edge of the lights "sweet spot" with only supplemental side lighting (and a thick canopy).

Harvest will be quite affected by using only 400 watts (and it's only 2 plants). Next time, short clones thrown into flower quickly, and/or only 1 large plant.