Zanyzap Pre-Filter Sponge 3 Pack for Fluval Edge Aquarium Description These premium quality pre-filter foam sponges quickly and easily attach to the intake tube stem, preventing small, baby, or weaker inhabitants from being drawn into the filter. This is a must have for all shrimp tank owners and anyone else who has baby or small fish in their tank. Installs in seconds and lasts for months or even a year, depending on contents and load factor of your tank. Aids in biological filtration. Traps debris and prolongs the life of your filter media Features: 3 pack of premium quality pre-filters for Fluval Edge Easily connects to filter intake stem Prevents small and baby inhabitants from being drawn into filter Traps particles and debris Enhances biological filtration Product Details: Is Discontinued By Manufacturer ‏ : ‎ No Product Dimensions ‏ : ‎ 5.1 x 3.1 x 1.5 inches; 0.48 Ounces Item model number ‏ : ‎ FBA_FEDGE/3PK Date First Available ‏ : ‎ January 21, 2011 Manufacturer ‏ : ‎ Zanyzap