Eheim Substrat 830g - 1L filter media promo it also includes a 2830-075

it also includes a 2830-075 Series modular hose adapter

Nitrate in water rapidly

protein skimmers

Dimensions: 16 x 13 x 6

000 mg/L) ferrous iron (Fe+2) gluconate supplement

Eheim Substrat 830g - 1L filter media promo it also includes a 2830-075Description 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