ITEM NAME:50x50x2.5cm Fish Tank Aquarium Sponge PadFilter Biochemical Foam Pond Filtration 1. We ship to worldwideï ¼Å’ I will add a tracking number in.Size: Approx 50x50x2.5cm (L W H). Thickening Biochemical Filter Sponge, tough and durable. This Fish Tank Biochemical Filter Sponge can be used in sea water tank, fresh water tank, aqua-plant tank. Strong filterability, can stable water quality and reduce fish died.