10 Pack of High Quality Aquarium Cleaning Pads. These cleaning pads are suitable for cleaning both glass and acrylic aquariums, including all models of biorb tanks. These cleaning pads measure 80mm x 80mm and are made to the same size as the biorb cleaning pads. When using these cleaning pads, please make sure you do not trap any gravel or sand underneath the pad, as this may scratch the aquarium. Please Note: This is not an original product. It is a compatible product intended to perform the same function. Brand names are referred to for reference purposes only.