Aquarium Canister Filter Pads Sponges (9 pcs) Replacement for SUNSUN HW-304B/404B/704B/3000 CF500 Filter Pads Bio Sponges

Maintenance of the bio sponge filter pads? Remove and clean with water when the sponge pads are found to be dirty, or remove and clean once every 1-4 weeks It is recommended to replace the sponge in 6 to 12 months or after the sponge wears out, because long time use, there will be debris particles blocking the micro-pores of the sponge, affecting the use. Dimension: 8.5”x8.5”x0.79” (L x W x H) Includes: 3xcoarse (Black) 3x medium (Green) 3xfine (Blue) After-sales service: When you buy Aillsa Filter Pads Bio Sponges, you can apply for return or exchange if you are not satisfied with the product. Any questions about g filter pads can be consulted at any time, and we will reply by email within 24