Thanks you guys for your input. I put this system together from info I found online: 1 each bigass tub, about 27 gal size, with 8 sites in the lid, but I only have 6 plants going. I used 1/2" pvc for the manifold that has 24 nozzles. There is a drain in the bottom of this tub going back to the reservoir, through a cheesecloth filter. I'm using a 396gpm pump. The reservoir is 8 gal. Running a total of 250watts of LED 18/6. My pump runs 1 on/4 off, non adjustable, duh, so shopping for an adjustable type. I have a fan running on the plants, the temp stays around 80 degrees. My water sucks ass, my mighty fine meter reads 760ppm before adding anything. I've been flushing/cleaning the reservoir, pump and stuff weekly, so this week I think I'll check out some decent water, and ultimately into an ro system or something. What do you guys use? Anyway, that's my story. No experience, but I learn fast. Thanks for all of your help.