Deformed Leaves, kinda baffled

So this wasnt happening a bit ago, i had some mag deficiency that was about it, now alot of the new growth has these weird leaf edges and a few are starting this weird curled deformed leaf tip, any help with this would be awesome.
Veg = 8bulb 4ft t5ho
Temps 78 daytime 70nightime
C02 bag in the corner
humidity 40-65%
No Bugs evident and ive looked and stared for hours
It was doing awesome until these last 3 or 4 nodes started to grow up after i topped the plant a few more times.

Thanks a ton,
Shaggy


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