What kind of light are you using?
Do you have a fan..?

You need a small fan.. just to keep the air moving between the lights and the tops of the plants...

Air flow should be good enough that you can bring HID lights within a couple inches of the tops of your plants. If you are using fluorescents you can bring them within 1/2 inch.. just keep the air moving.. even if it is a very very subtle movement..

Do you know what your ppm or ph is?
You definitley need to get a ph tester if you are growing hydro...

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