Changing filtermedia
Thank you very much for your inquiry by email. It is not true that all the filter media generally have to be replaced after 12 months – the insert time could be longer or you have to change it in a shorter time.
We are sorry, but it is generally not possible to give a period of time when the filter media have to be changed. We recommend to change the filter media after 3 to 5 times washing out. We can not assess how long the period between the cleanings of the respective filter is - sometimes it could be 6 or 8 weeks, sometimes a half year or more.
We also recommend to change only 2/3 of the filter media Subtrat (or Substrat pro) and 1/3 of the old filter media should stay in the filter – because of the bacteria on the filter media. The white filter pad have to be changed at each cleaning of the filter.
I hope that this information is helpful for you.
If you have further questions please don't hesitate to contact us again.
Mit freundlichen Grüssen / Yours faithfully
i.A. Cornelia Veith