First indoor. SOG from seed HPS400W 1x1

Started a couple days ago the 12/12 hours light schedule. It looks to me that the nutrients are doing their job, although they could do better if i correct the water ph. Yellowing of the leaves stopped and the plants started growing at better pace. It's funny how, in one of the plants, the caterpillars "fimmed" the top... let's see what's gonna happen. And thank you in advance if you guys have some raccomendations