Perfect Aquarium Glass Scraper with Plastic+Metal Razorblades for Glass & Acrylic

This scraper is perfect for ANY and ALL of your tanks. Razor blades are unquestionably the best way to clean algae, and they're actually far less likely to scratch glass than other methods (which trap sand and scratch the glass with the sand). 

This scraper includes metal razor bades for glass tanks, and stiff plastic razor blades for acrylic, plastic, or curved (bowfront) tanks. And tons of replacements are included!