clean lookin setup jensen. especially for ur first run.
ive done DWC and grown Power kUsh in the UCDWC systems. I have 5 different phenotypes of power kush that i narrowed down over the last year. Its a great overall strain. Large yield, great fruity aroma, bushy growth using supercropping and FIM methods. Also high THC % -i got mine tested at 15.6% just two weeks ago.
A couple tips for DWC;
use H202 with every water change 1ml/gal
-this will kill bacteria (good or bad)
DO NOT use beneficial bacteria products such as; roots excel,
great white, oragnic teas, etc. the h202 will kill it all off.
I found that running dwc completely sterile (VS partially organic) is the safest method to avoid pathogens and other issues like root rot.
CHillers are best to keep ur water temp down which should be 65*-68* 24/7 especially considering the plant roots are submerged all the time. Higher water temps will promote bacteria growth and lead to other pathogen attacks. especially since the nutrient solution is recirculating 24/7. Ive seen it first hand, i got fusarium wilt in week6... took out half my crop.
Run nute ppms 1/4 strentgh and slowly work up to 1/2 strentgh. "less is more..." the plants soak in nute solution 24/7 and dont need high concentrations of ppms over 1000. They will take wat they need when they need it.
Have the right sized AC. This is most often overlooked by every new grower or even experienced growers under estimating the rooms cooling requirements. temps on plant foliage can vary a few degrees higher very easily compared to ur ACs set temp or ur room thermometer. HIDs are very hot and need proper cooling. the cool tubes with proper cfm exchange will do a lot for u, keep ur lights 14"-18" away from your canopy to help avoid ur nugs from foxtailing or encountering any other negative heat stress side effect.
Ambient room temp affects the water temp as well. So cooler is always better.
Heres a formula we use in HVAC to neutralize the heat load in the room;
Total WATTS x 3.51 / 12,000btu= Required Tons of BTUs
If you ever add c02 to ur room, make sure ur air pumps are located outside the grow room so they intake OXYGEN, not C02. U want 02 in ur water not c02.
keep ur humidity in check to avoid powdery mildew during late flower. use a dehumidifier to keep RH% 40-60% -especially during lights out
Hope this helps some, im lookin forward to seeing how ur power kush turns out.
hope u dont mind, i can delete if u want.
trim up the lower portion of the plant that doesnt receive as much light.
http://i1127.invalid.com/albums/l640/budlust/IMG_1259.jpg
training mehtods will promote lateral growth
http://i1127.invalid.com/albums/l640/budlust/IMG_1228.jpg
http://i1127.invalid.com/albums/l640/budlust/IMG_1227.jpg
-boomer