First Grow - Sweet Zenzation

It’s been a really busy week in this little 2x2! I topped her about three days ago at the fifth node, counting the first set of fan leaves as the first node. She seems to be bouncing back very nicely. I audibly said “wtf” when I had checked on her the day after that, those top fan leaves had grown immensely over night. Any advice is always welcomed. Thanks for looking! Maybe I’m doing too much but I stripped her bottom most node, leaving 4 mains to train out. I’d like to try mainlining someday, as it seems to make a neat; more manageable arrangement. But I’m trying not to experiment too much given this is my first grow, I’d like to make it to harvest. I have also lowered the lights to around 19” while maintaining a PPFD of 450 in order to counterbalance the warmth coming from the light. This week I dosed 3 drops of MicrobeLift Mosquito Control into 2L of water, as I had seen a fungus gnat earlier in the week. I did try to starve the fly of moisture since the plant didn’t need water for around 7 days this cycle. I forgot to PH this time around however. I anticipate she will need a feeding soon given the topping, as well as the few wires I added to stimulate horizontal growth. So, a few days before the next watering I will top dress with some Roots Organics - Terp Tea (grow) at 1/3 strength to get a jump on those amendments breaking down. edit: I just realized I should be training the branches and not the fan leaves, so I took off the wiring for now.