have 8 kush plants, 4 og and 4 purple. closet rig, 600w about 1.5 -2 ft obove plants. good air circulation.. doesnt get too hot, fan bolowing. Im starting with distilled water, ph down to high 5s, and ppm at arond 600 (bloom yellow bottles A and B- at 270ppm each, ... pretty close to anyways...