"ps how did you build the cool tube ?"
really simple, all you need is
hurricane glass from Micheal's 11&3/4 inches long, two 4 inch pvc pieces,( you can get either elbows or regular straight pieces but my room is small so i got one elbo and one straight piece) strong double sided sticky tape, electrical tape, and 4 4 inch screws with one bolt. Once you have everything, just remove your socket from you reflector and use one of the screws to mount the socket into one of the pvc pipe pieces, the socket should have a little whole to put a screw in, then put the bolt on it to hold it in place in the middle of the pipe. Also drill a couple of wholes for the two wires to go through. Then use the other 3 screws sort of as a vice from all sides equally clamping it in place. After that just use the sticky tape to attach the glass to the pipe and wrap it with electrical. and that is it, seems like alot but it only takes about 15 minutes. You dont have to make it like i did, you just need to have the concept down and you can use your imagination. Really all it is, is the light inside an airtight piece of glass with an exhaust suckeing the hot air from the bulb out of the room.
Believe me this thing works great! My high is only 82 now compared to 88 before, and I can put the light almost about 5 inches away from the top.
"what nutes and additives are you using.They grew so fast.i hope my hydro grows that size at day 25.your doin a hell of a job.i remember back in the mid 90's when i first seen the design for that system on the 420.com forum.everybody fell in love with it. that forum was loaded with people using/switching to that system.They're not as common in here though.
maybe with the results your having you can make them as popular in here as the guy did 12 yrs ago in the 420.com forum =)"
Yea i cant beleive more people dont use dwc, if only they knew how easy they are to make and how easy they are to maintain they would be hooked instantly. Well in the picture i was just using flora nutes, but i recently added big bud and carboloard when i switched to flowering. The more oxygen to roots the faster the growth. So if you want fast growth by a crap load of pumps or that big pump from GH. Also just do a little research and try to mimic the ideal conditions for marijuana as much as possible. This is not hard, but it takes a little money. For instance, ppm meter, ph meter, ro water, temps, intake, exhaust ect. It aint cheap!!