For the acronyms you can check out this page
http://www.3reef.com/reef_acronyms.html
Yes you could hang the berlin on your sump.
I dont use a UV because yes it takes out the bad but it also takes out the good stuff in the water.
Why not put the heater in your sump???
Powerheads for sure. I try to get a minimum of 10X turnover (right now i have about 45X turnover). No bubbles.
Marc.
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20Gal, 45 lbs LR, 65W PC 10 000K + 65W PC 20 000K + 10Gal sump/fuge
Livestock :hermit and snails, Green star polyps, Button polyps, Finger leather, Xenia, Zoanthids, Mushrooms, Yellow polyps, montipora digitata, acropora, ?mistery polyps?, mistery crab, six line wrasse