Mist
Member
You will definitely need something more than a fan cooling that bulb. My 400w MH is super aircooled and still I can only keep it 2" from the canopy.
2" from the canopy?
First of all, why do you need it so close? And secondly, do you just have one little plant under it? Because at 2" from the plant all you are getting is a foot print the size of you hood. 12" would be a better distance with a 400 watt.
zmanforever,
Yes, you should run your aero unit 24/7. Otherwise the roots will dry out while the plants are small. When they get huge root balls in that tub you will probably end up just putting in a couple airstones and turning it into a Deep Water Culture system because the roots will engulf the sprayers and make them ineffective.