Day 17 from seed and need some help!

[DEVGRU_420]

Day 17

Currently feeding at 1.3ec
Run off: 6.0ph 630ppm
Canna Coco A 7ml
Canna Coco B 7ml
Canna Calmag Agent 4ml
RH 57-62
Temps 78-83
Light 40+ inches away.

Still having some leaf edge curling along with a few rust spots. New growth looks fairly healthy. Should I continue with canna's chart on "light feed" or should I bump it up to "normal feed" Normal feed would be 8.7ml of A and B compared to 7ml at light feed. I'm also using canna's water method, weigh the cup right after watering and when it gets to 50% of the wet weight water again.
Any tips would be greatly appreciated. Thanks dudes!

 

[Shayne010944]

1.3ec seems way to high , I’d back it to 1.0ec and if your in coco watering at least couple times a day

 

[mysticepipedon]

Slight Mg deficiency.

 

[Cocogarden92]

You ever figure this out? I’m having the same exact problem.

 

[growsince79]

I'd transplant to a bigger pot.