When I can afford to, Im upgrading to a 4x2x2. I'm still in the planning phase of things and this is my plan for a sump 
1st chamber - drain, sock (considering a dual sock) and skimmer.
2nd chamber - live food (the horizontal line is a brace to hold media baskets full of shrimp, small fish etc), heaters, UV sterilizer.
3rd chamber - return.
The second pic (with all the dark boxes drawn on) is a rough idea of how I'm thinking of setting it up. The white tube thing in chamber 1 is the drain. The cone thing on the end of the drain is the sock. The skimmer is the light grey tall thing and the black box thing is a media basket turned upside down so my skimmer sits at the right level. Chamber 2 has 2 more media baskets for the live food, heaters along the bottom and the grey thing in the middle with the white tubes is the UV pump and input/output pipes. Chamber 3 is the return T'd off with ball valves or gate valves so I just have to turn a few knobs to drain water for a water change.
I know UVs aren't commonly used in reefing, but I'm doing a predator tank using locally caught live food, so I need it for 2 reasons. 1 to control disease (after QT of course, but small feeder fish don't stay small enough for a full 2 month QT). 2 to kill any algae spores. I'll have messy feeders in the DT and I'll have to feed the live food, so I'll have an extremely high bio load.
I'm thinking if adding a chiller too. I think I'll need one.
Any thoughts, comments, suggestions? All are welcome

1st chamber - drain, sock (considering a dual sock) and skimmer.
2nd chamber - live food (the horizontal line is a brace to hold media baskets full of shrimp, small fish etc), heaters, UV sterilizer.
3rd chamber - return.
The second pic (with all the dark boxes drawn on) is a rough idea of how I'm thinking of setting it up. The white tube thing in chamber 1 is the drain. The cone thing on the end of the drain is the sock. The skimmer is the light grey tall thing and the black box thing is a media basket turned upside down so my skimmer sits at the right level. Chamber 2 has 2 more media baskets for the live food, heaters along the bottom and the grey thing in the middle with the white tubes is the UV pump and input/output pipes. Chamber 3 is the return T'd off with ball valves or gate valves so I just have to turn a few knobs to drain water for a water change.
I know UVs aren't commonly used in reefing, but I'm doing a predator tank using locally caught live food, so I need it for 2 reasons. 1 to control disease (after QT of course, but small feeder fish don't stay small enough for a full 2 month QT). 2 to kill any algae spores. I'll have messy feeders in the DT and I'll have to feed the live food, so I'll have an extremely high bio load.
I'm thinking if adding a chiller too. I think I'll need one.
Any thoughts, comments, suggestions? All are welcome



