Made by our very own Big Al's Products, these Foam Filter Inserts make an easy-to-use, cheaper alternative to Aquaclear Foam Inserts. These high-quality filter inserts mechanically filter out unwanted particulate matter and waste from your aquarium without limiting the ability for beneficial bacteria to grow and flourish, effectively encouraging a cleaner and more hospitable aquarium environment. You can use Big Al's Foam Filter Inserts in freshwater and saltwater aquariums, including the Hagen Aquaclear Mini. We supply foam filter inserts for the following models: Mini/20, 150/30, 200/50, 300/70. Simply click on the drop-down menu above to specify your model and to see the specific size and shape of each different filter insert. Make sure to shop all of our mechanical filter media for even more excellent and affordable aquarium products.