White Widow, don't kill me

We're off to another great start, but there's lots of time for me to screw it up still. She's a beautiful, dense little plant so far. If she doesn't stretch quite a bit, I might have to trim some leaves later on, despite the under-canopy lighting. It's just too dense to penetrate at this point. I'm still planning to try for one good, clean grow from start to finish before trying to introduce LST, lollipopping, or any other substantial shaping technique. Hopefully, there will be little more than refilling the humidifier bucket every day and adding 1 or 2L of water to the plant base. I'm still mostly watering with filtered tap water, but I throw in a day of distilled occasionally because I'm not sure how much of what might be building up from that tap water.