I have 3 different RDWCD systems at one location and they have their pros and cons
UC 13gal 8 pods lots been said about it and it works well
DIY 225 gall 8 pod system made from 28 gallon tough boxes in and out are staggered, one hole on left side one on the right. It works very well and is not very deep 15" the big issue is the roots plug up the 3" pipe and kind of sit on the bottom. Plus there is lots of surface area and I decided to run 2 six inch air stones in each to get good coverage. I am on my second grow with just one 6" and it worked fine. Been doing tons of reading and am convinced air stones are not the way to go in shallow applications.
DIY Jumbo 300 gal 8 pod system using 30 gal blue plastic barrels ( called footballs) This guy just blows away my other 2 RDWC systems. 30" high and 19 1/2" wide with 10" net pots and 4" pipes. This system grows trees, big trees. I ran two 6" air stones in this system also and have gone to 1 six inch. because I did not notice ant difference last time. The only thing with deeper systems is you need more power to push the air if you just dropping a line in. I noticed one day that as I pulled the air stone up it put out more air. Went to a bigger pump problem solved. I am hoping to find a larger spot for the jumbo as there is no room to move by week 6. If I was going to build a system it would be this one.
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