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- Aug 11, 2013
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I am considering dual Vectra return pumps for my Red Sea 900 3XL with dual returns. I know a single Vectra can be calibrated to provide a neutral flow condition in feed mode (to prevent back siphoning). Is it possible to calibrate a dual Vectra setup? Also, what Vectras are recommended for a 900 3XL? I'm thinking two M2s.