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  1. What is difference between Canister Filter & Reactor?

    Freshwater Aquarium Equipment
    I will be upgrading my current 55 gal HOB filter setup to a 190 gal with a fluval fx5 before the end of the year. I currently do weekly water changes to keep nitrates in check but i want to add some Seachem denitrate chemical filtration help for the new aquarium. I know i cant use the fx5 to...