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add saltwater (for best results use NutriSeawater) then add fish
Equipped with fine active charcoal foam
outperforming other substrate brands
200 gallons
Rapidly activates biological filtering activity
EHEIM Pro 4+ External Filter 350 (2273) 10-20 add saltwater (for best resultsThe EHEIM professionel 4+ our best external filter but now with an integrated emergency button. EHEIM have adopted the many advantages of the professional 3 series powerful performance, optimal energy efficiency, quiet operation, priming aid, safety hose adapter but we have also improved the technology by incorporating the new Xtender button. In the event the output is reduced due to the fine filter media blocking, the button can be adjusted to