Here are my plants "stats"

clone is in 4"x"4 Rockwool cube

Growing in a General Hydroponics waterfarm constant drip system

I use advance nutrients 2 part sensi-grow for veg and 2 part sensi-bloom for flower

i stay around 1400-1600ppm

water changed once weekly

Ph 5.8-6.2

Temp is 21c - 22c constant

light is a 400w HPS globe, hood, and ballast (with option for MH globe)