OK, so I finally went ahead and did the whole thing with six waterfarms, moved everything in and just relocated the res to where I needed it and drilled some holes so I could feed the 1/2" tubing into my space and I'm not real sure it it's truely circulating. I set my ph 5.8 and about 400 ppm and then by the next morning every waterfarm module was waaaaaaay high and way different than the res. It's only been two days but if this isn't really recirculating I'm going to freak! I reset the ph and everything again but man! Weedhound do you ever test your individual waterfarm modules as well just to see? I'm thinking about taking everything out and run some clear water with food coloring in it to see if it pulls through each module. Alright dude, later. Hope everything is good with you.