Sensi Silver Haze - First Ever Grow

Apologies, I thought I had taken more pics over this period but sadly only 2 poor ones. She's coming on amazing! All new growth is looking healthy. The mutated leaves are starting to wilt. I'm still not touching her yet, I want to stress her as little as possible until I'm 100% sure she's good. Excited to switch the lights to 18/6. The LEDs are some cheap Amazon specials (SYGAVLED) that I bought years ago and they give off a small amount of heat (has a cooling fan on the top which helps air circ too!) but not enough for the massive temp drop we've had over the last few days. Had to pick up a small oil radiator for a heat source. I also hadn't thought too much about how little insulation the tent provides, esp at night. Covered the tent fully with some old thick duvets & blankets. Then I had the issue that my extractor fan is single speed and pretty powerful! It was sucking the heat out of the tent within minutes! Decided that I didn't need to have it running all the time so I let it run just a couple hours a day while turning the radiator on full blast to keep the temps to 18c. Time to research some environmental controls. Started feeding her Biobiz Bio-Grow (little less than their chart recommends just for the first week of veg). I bought the small 3 pack tester set Bio-Grow, Bio-Bloom & Top-Max. I'll be following the chart the entire grow. This is also the first time I'm pouring water/nutes onto the soil rather than spraying it. Starting with 200ml ish (I didn't really measure) and see how it goes. I forgot to mention that I don't have ratchets for my lights yet so have had to place the pots onto a stack of books to get the right distance from the plants. Around 20 inches seems to be working well, no burning. I also think this may be helpful for insulating the roots from the cold floor. Things to buy: Fan/heat controller ratchets for the leds