Algae Free Replacement Plus Magnet Cleaner Glass Scraper Blades

2 pack of replacement blades for all Algae Free Plus Magnetic Cleaners. For glass aquariums only. Made of stainless steel. Compatible with all Algae Free Plus Magnetic Cleaner models To replace the blade: Remove old blade by grabbing the plastic piece in the center with your thumb and index finger and push down with thumb. Reverse the process to replace with new blade. Steel blades for glass tanks are made of high quality 316 stainless steel which is highly corrosion resistant but we still suggest removing from the aquarium when not in use.