I am growing under 6k watts. I built this custom PVC system using a router and jig. The system can accommodate about 100 plants, depending on plant structure. I am running two 70 gallon reservoirs, and each res has two large pumps (in case one burns out when I am away for a couple of days). I have inverted EZ-clone sprayers on either side of each plant site. They spray the roots for one minute every five minutes. My grow is probably most technically understood as an NFT system, since the root mass of each plant eventually fills the lower third of the 6" PVC gully.
The pics show my grow at about four weeks into bloom. I transplanted these babies directly from my EZ-cloner to this system, then ran my HPS lights at 18:6 for the first week to get a bit veg time. Other than their time in the cloning machine, and one week under 18:6, I don't really veg my babies.
In this grow, I have all Super Lemon Haze. I am conducting an experiment with the two reservoirs, using Heavy 16 in one system, and Cutting Edge in the other. So far I see no real difference between the two sides of the garden. Both look fantastic.
You can see that I try to cut away most of the foliage and flowers below the canopy I want these plants to send ALL of their energy to those big top ripe flowers. This also makes the system easy to see and service.
Finally, I've includes some closeups of the young flowers. I love the smell of SLH, and these ladies are already starting to smell really nice.
Other notes about the system:
CO2 from burning natural gas on regulator.
One big AC unit.
Air-cooled lights, one 6" fan for each pair.
All Reverse Osmosis water
I change nutes every week. Fresh nutes peak at about 1400ppm, and drop to about 900ppm by the end of the week.
Edited by BigInfinity, 12 May 2012 - 02:54 PM.