if your growing in soil and hydroton, and watering 3 times a day, there inlies your problem, you can't go half and half man, it's soil or hydro, there are some exceptions but your method is not one of them.
I've stopped watering and feeding and they look better now. Probably it will be like a flushing for them. I was lucky also with the outside temperature that is lower now. But in the next summer i don't think that I could grow any more. Thank you.