Grow Mediums Any suggestions on the lighter color and leaf edges bending down

[throxic]

The front plant has been a lighter color and the leaves are whispy and the edges are bending down. Anyone have any suggestions on a solution? I've experienced something similar when growing a photo with only 1/2 nutes so when I bumped it up to almost full strength; I seen an immediate change after a few days. So, I thought I was under-feeding (1300ec). I bumped it up to (1600ec). Maybe it needs more, but this is an ILGM Banana Kush Auto (smaller than other auto's I've grown in the past) so I've been keeping the nutes at 1/4-1/2 of the recommended. Four days have passed and it still seems to be having issues. I should also note the stretch was very small, but it is a indica-dom so I digress. Also thought maybe lights, but not seeing any telltale signs of lighting issues. Light, Mars Hydro SP3000, is at 22-24in @100%. Coco/perlite 60/40 no air domes. Res PH stays at 5.5-6.3.

Hope that's enough information, obviously this is my first go at this particular cultivar so growing pains are expected. I look forward to the responses!

 

[Mañ'O'Green]

I don't see anything really wrong with that plant. The appearance is genetic traits. The little bit of tip burn means you have hit the upper limit of the nutrient PPM the plant likes. Just be sure to keep the Temps and RH in range. 68°F night 78° day and RH >40%<60%.

 

[throxic]

A different phenotype? I didn't think of that. I could definitely see that being it. It's a lot lighter than the other one and the top bud sites are larger. Thanks for the response.