hi guys , i really need the wisdom of anyone here who knows of hydroponic or indoor growing in general , my top leaves are getting preety lemon like yellowing on the middle of them , a couple of ones are too ,but not as the top ones , i didn't think it could be the lighting, but today i found that 2 of the big leaves are like brownish at the end ...but that is completely diferent as the problem i was mentioning at first..... aslo i have another question ; if my roots are reaching the water, i can remove the tubbing from the cup that is holding the plant ?? it will be safe that the rockwool can be dry ?? i am giving low doses of nutrients untill the mid veg state " General hydroponics"....also im giving cal mag weekly like the nutrients ...please help !!