fits for 25W 400GPH (1500L/H), 30W 480GPH (1800L/H) 4-in-1 Internal Aquarium Filter,if you need bio-balls for the filter,please search ASIN number B08FHZ4P7W in amazon search bar.
Easy to install and clean,Bio-sponge can effectively filter waste and improve the circulation system to maintain a clean water environment.
Activate carbon absorbs odors and discoloration,provide a healthy water for your aquarium
Replace or clean filter sponge and Activate carbon every two weeks or sooner for optimal performance.
Included 2Pcs Bio-sponge and 2 packs activated carbon
