Maybe I used the wrong word there Mike. The point I was trying to make is they both require 2 different flow rates. Yes, you can run them in a row with GFO first then carbon and just get whatever flow rate you end up with after the water goes through the GFO reactor. The optimal way to do it is as I described so to allow 2 separate flow rates set correctly. Carbon generally requires a higher flow rate than GFO. You want the carbon to stay fluidized so that it doesn't settle to the bottom. Water will take the path of the least resistance so if the carbon doesn't stay fluidized (not enough flow) and settles to the bottom it will cause channeling. Your wasting your time and money if this happens.