Seachem 6" 3 in 1 Algae Scraper 
 
6" long
Includes Three Blades: Metal, Plastic and Soft Pad
Suited for both Glass & Acrylic (using Pad Only on Acrylic Tanks) *see setup on box
Ergonomic handle allows for easy use in multiple positions
Blades are replaceable, housing safely hides blade while not is use.
Floats for easy retrieval
Handle hole for hanging storage