Hi, I read your beginners post and I was very thankful and impressed. I'm setting up for my first grow. I'm going for 5 , little devil lowryder strains in a DWC/Bubbler system in a closet. Im going to use HID lights at 600w , I have MH and HPS bulbs with a reflector hood and switchable ballast. The walls of the room has been scrubbed and sheeted with mylar reflective material and I have purchased the General Hydroponics nutes. FlowGRO, Micro, and Bloom. Should I look into more additives? Will a T8 bulb work for germination and seedlings? Where can I find a PPM meter? If you can help me out and give me any advice I would really appreciate it. Ohhh yea, I'm using rockwool and hydroton pellets in 5' net pots in the DWC culture. I have a 4' round air stone and two auxillary 1 inch cube airstones in there also. I also have an ultrasonic fogger that I could put in there and was wondering if that would be overkill? I was wondering if you had a kind of nute schedule for veg. growth and blooming....when to flush...when to replenish...... This strain is auto-flowering , but was wondering if I should still flush and switch to HPS for blooming , and change the schedule from 18/6 to 12/12? Any and all help and advice would be amazing, you seem like the man with the answers , thanks alot and I hope to hear from you soon..