mag deficiency?

I been searching around and seems like I might have a mag deficiency?
Its about 3 weeks into veg
PH 5.5-6.4
EC .4
Temp 62
Waterfarm
2 tsp of flora misco, gro, bloom/5 Gal

perhaps its an excessive heat issue.

Im not to sure about this one. I would prolly buy some calmag and wait to see how they look in a couple days to see if it looks like it needs it.

Raise the light and blow a fan across the canopy.

Thxs guys. imma start LST on it tomorrow.