Do you have tough algae spots that your algae magnet scraper can’t get off?
One trick is to take a penny, place it on the magnet scraper toward one end, then place an acrylic safe magnet cover over the penny. This focuses the magnetic force on a smaller area causing more pressure on the tank surface. This pressure will help to remove those stubborn algae spots. As always, make sure your magnet pad is free of debris and test it on an obscure area of your tank first.