2 x DIY Course 10 PPI Foam Media Sheet for Pond and Aquarium Filters 18'' x 12''
Grade Of This Foam 10 ppi Course / Coarse Foam. Grade Foam 10 ppi. Grade Foam 20 ppi. Grade Foam 30 ppi. Grade Foam 45 ppi. Provides Efficient Water Flow With Less Clogging For Long Lasting Filtration.