just have a quick question as what you guys think is going on with these two plants. There is a handful of leaves looking like this. My friend who just gave them to me said he has been feeding General Hydroponics once a week with a 5ml-5ml-5ml per gallon. Each plant is given a quarter gallon feeding each week. These plants are i'm guessing about a month old as they are standing about 18" tall. Should I change their formula as they seem like they have some deficiency?