Plumbing TLF Reactors - Waterflow Together or Seperate?

[FishyFishy!]

Yeah I actually have a seperate pump for each one. I just plumbed them together the other day to have less tubing everywhere. I wonder if I should go back to the regular setup, or even plumb them individually from my return pump.

When I plumb my new system, these will be running off a manifold from my return pump, so I will plumb them all seperate I think.