Sugar Breath - Humboldt Seeds

Its been getting very cold at nighttime. You can see the colour change mostly in the center plant. The temp swing is defiantly causing the plants to suffer in growth but they are still moving along. Indoor growing (to perfection), costs a lot of money in equipment, so I just do my best with what I have. There has been quite a bit of yellowing of lower fans, which is fine with me because it is mostly natural loss. I know they are getting plenty of Nitrogen, The loss leaves do not look sickly or spotted or anything indicating issues. No bugs, no mold or mildew. I have roughly two weeks of nutrient feed time left. I will blast the plants once at 2.3ec this week and fade back from that. Seems nobody is following or commenting anymore these days which is sad. This use to be a decent community of growers. As for the "grow-off" I guess @HjelmVapor cant be bothered to keep up his end of the bargain, Sorry Mark @Humboldt_Seed_Organisation but thanks again from me for the seeds. Trying my best over here.