Chamber 1 I have the not working so well skimmer (at least it oxygenates the water), two I have a heater and a little rock (more of a cryptic zone), 3 is just the return pump.
I do have a small korallia below the intake and a hydor flo on the return for more randomized flow.
I will prob upgrade to led's soon as my bulbs will need changing anyway.
I have a Aquaticlife Mini Protein Skimmer in chamber one. In chamber two, I have a media basket filled with filter floss, Chemi-pure Elite & Purigen. In chamber three, lives the float switch for my auto top off system.