Plumbing TLF Reactors - Waterflow Together or Seperate?

[subman]

Imho the one on the left is superior as long as you have the ball valves before each reactor. As mentioned above the two medias need different flows through them. I have the brs dual chamber reactors and I think I'm going to swap it out for 2 seperate reactors so I can adjust for optimal flow though each media. I like your idea of one pump split to the 2 reactors though.