Tips curling down and yellowing

Billpopy79

Well-Known Member
Hi all, I'm hoping for a little input here as I'm a first time grower and still trying to learn.
I'm on day 2 after flipping to 12-12 and I seem to have a bit of an issue with my smallest plant.

I did have some deficiencies in late veg which seemed to be fixed by upping feeding and adding Cal mag.
I now have this which I suspected could be nute burn but now I'm doubting myself.

The leaves near the top have downturned tips and the leaves near the middle have started yellowing.

I'm in Canna pro soil, 5 gal pots.
Biobizz grow 2ml, Cal mag 1ml and I added Biobizz bloom 0.5ml last feed.
Feeding every water which is around 40 hours wet/dry cycle.

The only other thing is I have added another set of led lights so they are under a total of 440w.
Lights 16" above plants.

Sorry about the pictures my wife sent me them whilst I'm at work. IMG_20191202_154525.jpgIMG_20191202_155552.jpg
 
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