Aqueon Algae Cleaning Aquarium MagnetThe Algae Cleaning Magnet from Aqueon is the easiest solution to effectively remove algae from your glass or acrylic aquarium. The bottom-weighted scrubber falls straight down after separation. The bowed bottom weight allows the scrub pad to rest above the gravel for easy retrieval while reducing the risk of scratching the aquarium walls. Includes one pad for acrylic and one pad for glass. Additional replacement pads are sold separately.