Eheim Professionel 4+ External Filter Filtration & Aeration Use double dose at start

Use double dose at start of season or when establishing a new pond/filter

and toxic substances to maintain crystal-clear water

Algae (including Ergosan 2% and Spirulina 0

as there is no need for frequent replacement

aquarium or sump

Eheim Professionel 4+ External Filter Filtration & Aeration Use double dose at startThe EHEIM professionel 4+ our best external filter but now with an integrated emergency button. We 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 redirect