JBL bio-filter foam pad UniBloc CristalProfi e4/7/90X

JBL UniBloc bio-filter foam pad serves as a replacement media for JBL CristalProfi e4/7/90X series external filters. The pad combines mechanical and biological filtration of aquarium water. The porous foam effectively traps coarse debris while providing a colonisation area for beneficial bacteria that biologically break down harmful substances, helping to keep water clean and healthy for fish and plants.