Fluxing an ILGM BGL in a 30 gallon tote

I've been playing around with different light heights. Since I'm taking my time vegging this gal I'm just using 2 100W LED bulbs in a shop lamp style fixture. I haven't watered since last time. There is still water in the reservoir. I'm considering just watering with CalMag and PH'd water this coming round. What do you think? I've only been reservoir watering up to this point (but I did spray around the stalk a little a few days ago). I'll probably do some top down watering this week too in case the reservoir water isn't reaching the upper roots. The right-side node is still higher than left to help promote more growth over there.