SUNSKY 50x50x2cm Medium Hole Fishing Tank Filter Cotton Aquarium Biochemical Cotton Cultivation Filter Material 50x50x2cm Medium Hole

Suitable for seawater, freshwater, aquascape, size can be freely cut

Dense pore gap and softness is suitable for cultivating good nitrifying bacteria

Decompose excrement and feed residue, improve water quality, good filtration and cleaning effect, reduce fish mortality

Wash once a month with water, no blockage, no deformation, can be washed again and again after cleaning

Thickened material, strong water permeability, more thorough and detailed filtration