Five Star Aquatics aquarium-specific designed Media Baskets help improve the filtration and clarity of your aquarium while making maintenance extremely easy. What once was a dreaded chore of chaining filters and diving into the aquarium is now made easy utilizing a 2-Sided Tower Design system. The stock EVO filtration is very dirty, a Five Star Aquatics filter system will fix flow issues with the stock design and sustain the aquarium longer. Fits Fluval Evo 13.5 in Chamber Two (accessory chamber) NEW - INCLUDES FREE PLUG TO BLOCK OFF LOWER HOLE ON FALSE WALL Keeps rear chambers clean and promotes clear water Provides an excellent location for chemical, mechanical or biological media Forces water through filtration media and not just around it Media Basket is two sided and once installed is "boxed in" Features a three shelf design with the middle shelf being removable, give you ultimate media options Built in handle for easy installation and removal Improves the poor flow track of Fluval's slotted baffle design, water if forced through the basket Makes filtration easy Fits Fluval Evo 13.5 Fits Fluval Evo 12 Fits Fluval Evo 52L Fits Fluval Spec 16 Fits Fluval Spec 60L 8-3/4" Tall 3-1/2" Wide 3" Deep