Blueberry muffin

Hey everyone, looking for ur opinions,

Looks like a great grow, however the first plant (picture one) does seem to have leaves clawing upwards and has a lime green coloration. I think the temperature in the grow environment may be too high , as it is a key indicator of heat stress. Also what is the EC/ppm? , as it could be slight under feeding or just a genetic trait of the strain (Light green instead of a darker hue of green).

Those plants are beautiful..keep doing what you are op.
FF