If you are tired of looking the fish poop accumulating on the sides of your fish tank, it could be time to invest in a new filter. Before you make the change, you’ll want to deep clean your tank first. This handy little tool is great for removing years of buildup on tank walls. This stainless steel scraper tool is only for GLASS tanks. If your tank is acrylic, you may find other varieties of scrapers that will work much more efficiently without ruining your tank.