Jack 47, 2nd run, UK Grow

This is the second time I grow this strain. I soaked the seeds in water for 24h, after that paper towel, after 2/3 days seeds were put in coco, after 2 days seeds broke the coco coir. As soon as the solid dried after the seeds germinated I gave the first feed to the plants, half strength. I'm using cana nutrients this time because I had success with these nutrients in the past, I'm also using Roots Excelurator because I had success with this nutrient last time. It's quite cold this time of the year, so I have the ventilation turned off to make the temperature rise inside the tent. Currently around 23 during the day and 18 during the night. So far the first week is going well. 1st day - NUTES PH-5.73 PPM-567 Water Temp-21.5 Liters - 1.12L