PS: The reason that your top leaves are looking like that is that you are using the wrong nutes (dispite comments to the contrary) and that you missing nutes. Don't panic too much at the moment but now (during this growing) would be the time to stop what you're feeding them with and go and buy a part A, part B and an S.A (micronutrients). Flush the soil for a week first and then start to feed in the amounts on the bottles and you should be fine.

Many people like to talk about nutrients and don't really know what they're doing with them but growers like myself who grow commercially know better.

Caio,

Fr33kMan