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Originally Posted by WWWD
that would be some very old skool mechanical filtration units. one of those canisters might be a uv and another might be a heat exchanger. whatever they are your better off skipping them and going with a more modern sump and skimmer setup.
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Skool. 
__________________
Bob
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To be loved you have to be nice to people every day - To be hated you don't have to do squat.
---------Homer Simpson--------
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