Advice needed on a UV sterilizer

  • We are currently upgrading MFK. thanks! -neo
What would you suggest? I have a 120g that i have 8 red belly's in, and a 125g that is 72 inches long that ill prob do discus in. Im planning on using a canister filter and or prob a emp 400.
 
So if i get a danner or turbotwist like nc_nutcase suggests what kind of powerhead should i run through it? i'd rather not mess with the fx-5's since they are not set up in the traditional way.
 
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