Jungle Laboratofries - Algae remover Pad (Pack of 10)

Dimensions:2 ¾ “ X 2 ¾” square X ¼ thick Algae Remover cleans off algae and water lines. WET sponge before using. Rub lightly to avoid scratching. Avoid getting sand or gravel in the pad as it will scratch the glass, Do not use on acrylic