Hate to tell you this.....but you add the nutes before you put the water in. you'll have to take the water back out, add your nutes, adjust ph, then pour in through top of second rez (which is sitting on top of the smaller controller)....the controller being the neat thing that looks like the inside of a small toilet. (Or perhaps I have that backwards?? )

The entire system runs on gravity and with 8 buckets going it takes about...24 gals to fill and run correctly...obviously a few less with six buckets. I fill mine until the large second rez is about 1/3 full.

One other lovely tip about the waterfarms (i have many but this one you'll need)....you need to check the ph in each module seperately....they change independently of each other despite the claims that GH makes that you only have to check the larger rez.
Weedhound Reviewed by Weedhound on . Setting up Water Farm by General Hydro Ive been hauling up filtered water to my new system for 2 days. Its the Water Farm with 8 buckets (although using on 6). I have put in 16 gallons of water. The water all drains from the reservoir to the controller below and into the buckets, the pump is working and I see all buckets are about half full of water. Where am i supposed to put the nurtrients? In the controller or the reservior? I imagine the serservoir only needs to have fresh water? Right now at 16 gallons the reservoir Rating: 5