Microbial Algae Clean | Green Water Control | The Pond Guy
Amazon.com : NEPTONION 24.5'' Professional Algae Scraper, Aquarium Blade Cleaner with 10 Pcs Replaceable Blades Stubborn Algae, Suitable for Water Tank Size Above 30 Gallons : Pet Supplies
Removes Algae Outdoor Cleaners at Lowes.com
Green Gobbler 2 Pack Outdoor Cleaner with Hose End Sprayer | Removes Tough Stains Caused by Algae, Mold & Mildew | Safe for Siding, Brick, Concrete, Wood & More, 64 Oz - Walmart.com
Long-Term Protection Against Mold, Mildew, & Algae Stains.