Why does Kaldnes K1 media float and not sink?
When first loaded into your filter the Kaldnes floats because tiny air bubbles are trapped within the 4 central chambers of the media. The surface tension of the new plastic media needs to be reduced before it will attain neutral buoyancy. In fresh tap water this process can take up to four of five days before the K1 circulates within the filter chamber correctly. In an existing mature system where fish waste present this process can take as little as 2 hours.
