Hello guys .. im from Crete/greece.. my head is gona blow from info's i've read the whole site for 2-3times or more .. I love cannabis and I think I am ready to grow a massive plant that I want to .. one question , I will by the 4th stage of supplies as gwe suggests and I want to known if its possible and safe for plant's to add another one 600w HPS and MH also .. i'm so happy to be here guys with you .. waiting for answers see you guys later