Heya

My 400w MH is 45cm from the top of the plants and doing great.
Watering wise you should water when the top 2 inches of soil is dry, how often you water depends on your soil and the size of your pots, small pots dry out fast under HID lighting, i used to water every 2 days in my little pots, after transplanting to bigger pots i only water every 5 days.

Im using a soiless mix (1/3 coco,1/3 vermiculite,1/3 Perlite)

Peace :rastasmoke:

P.s On your next grow ORDER SEEDS!!!