GFO and Carbon Question

[Reef Pilot]

Originally Posted by Elias@caco3reef.com

I run 2 modified reactors having them running parallel 1st the activated-carbon then the HC-GFO teeing off my main pumpwith a shot-off valve that I have it tuned down so my activated-carbon is risen for approximately 3/4" from original height and yes you will see a very faint bubbling motion on the surface.As the HC-GFO will rise for approximately 1/2" free flowing is what you are looking for both media.
Best follow my specifications with the modified reactors.
Hope that helps and facilitate the build of your reactors.

You said in parallel, but don't you mean in series? IE, flow first to the carbon, then to the gfo before returning to the sump?