These pre-cut filter sponges are intended to work in combination for Ultum Nature System's Original All-In-One aquarium tanks. Please note that this sponge does not fit the UNS Dual All in Ones. Click here for the UNS Dual All in One Replacement Sponge Reference the sizes below to purchase the correct sponge for your All-In-One aquarium. Simply remove the existing sponge, and replace it with a new one! We recommend allowing the new sponge to float in the tank for a few days to soak prior to switching sponges out. Specifications: 30A All-in-One Replacement Sponge 7 * 5.5 * 22.5 cm 45A All-in-One Replacement Sponge 10 * 6 * 20.5 cm 60A All-in-One Replacement Sponge 13.4 *6 * 28.5 cm*Not compatible with the Dual All-In-One!*
