Plant looks light green/yellowish

hi.......qestion I have is......... 1. Did you use new soil, or did you use this soil for more than one grow? 2. Did yo measure the ph of tap water and are you giving nutrient solution? 3. How big is your light intensity?? In any way, you should be able to measure ph..........which should be arround 6.5 growing in soil. My guess is, the soil is not new and you dont control tap water ph, which mot likeley will be too high

I was looking for your diary to get more info on the whole setup but I couldn't find anything... however, on your profile, there was this question: "I used the Guerilla Tabs as indicated on the box. It also says that there's no need for PH up/down - but I'm doing it anyway in the water. The growth is now at week 2, - healthy plants, but now I'm wondering if it could be harmful to continue like this when I fertilize in 2 weeks? Best regards" In my opinion, the problem is right here! The PH Perfect products are designed for high PH... if you adjust the PH manually, you're not "helping them do their job better," YOU'RE MESSING IT UP!

I doubt this seedling has already used up all the nutrients from this pot… It can’t be a proper deficiency from a lack of nutrients in the soil. Make sure your not blasting your seedling with your light and check the EC of the soil.

Node spacinglooks fine, so that looks hungry. if by chance you recently significantly increase light intensity, dial it back, but based on growth seen, it's fine as is.