Eheim Substrat 830g - 1L filter media promo Secure Hiding Space: The primary

Secure Hiding Space: The primary function is to offer a safe and private retreat for reptiles

protein skimmers

Glass Thickness: 20mm

They have a dark brown to black body adorned with bright orange to yellowish wavy or straight stripes

Dimensions: 16 x 13 x 6

Eheim Substrat 830g - 1L filter media promo Secure Hiding Space: The primaryDescription The main task of biological filter media is to offer the best colonisation conditions for the bacteria cultures, so that after a short time a bacteria lawn develops. The bacteria feed on dirt particles of all kind and convert substances critical for the aquarium. After the first cleaning process by the mechanical filter media (e. g. EHEIM MECH or MECHpro) the biological filtration is the most important. It provides for clear, healthy water