New growth seems more light green than usual

Hello, these plants have been growing for around 2 months from seed. They are in organic living soil, no nutrients used. Water PH is around 7. I recently moved them into this room. The temperature stays around 75 during lights on and 67 at lights out, humidity is around 50 to 55 lights on and 55 - 60 lights out. I have a 315 cmh on one plant and a 225 true watt hlg on the one that is turning what seems too light green at the top. The HLG was at 120 watts, but I turned it up to 225 when I put them in this room. I had a fan oscillating but blowing at both plants from only 6 inches away for a day when I moved them. I had the HLG at only about 18 - 24" above the one that's turning light green after I turned it up and the plant started drooping and not looking happy. I think I may have underwatered a bit because I gave it about 1.3 gallons yesterday and it's looking more and more perkier since then. It's in a 7 gallon smart pot.

I moved the HLG up to about 36" in case that was the issue on 6/31 before lights out.

I attached a photo of what it looked like on June 28th, when I moved them and it still looked really good. Anyone have any ideas if the coloring is something to worry about? Could it be from under watering a little or too much light?

The first photo is from June 28th, the rest are today.
 

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TintEastwood

Well-Known Member
I'm on my lil smart phone, looking like Mg def.

Those girls may have consumed what the soiI had to offer, for one or more nutrients. I assume they need nutrients, but I'm a dummy with soil.
 
I'm on my lil smart phone, looking like Mg def.

Those girls may have consumed what the soiI had to offer, for one or more nutrients. I assume they need nutrients, but I'm a dummy with soil.
I just transplanted into this 7 gallon from a 1 gallon about 2 weeks ago, so it seems unlikely it's used up all the nutrients in the super soil already I would think. Someone I know said they think it's normal and they will darken in time.
 
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