Looking good not so good ?

Hey if like to start off by saying this is not my first grow if had succssful grows befor but that being said Idk if I should be worried I guess call it growing nerves but I use fox farm soil mixed with coco and use fox farm nuits I also water with cal mag and my lights are 18 -6 I use two water I know I know shame shame but it worked befor now I have so e rusting on one leaf of my banana jack I'm pariniode right !

give them time they look good and green still young,should be fine