Blue Planet Filter Box for Betta Plus 8L Replacement filter box R-025 / FB-025 for the Betta Plus 8L LED aquarium. Suits the new LED model only. Includes box, lid & cartridge media. Please check the code on your filter box prior to ordering a replacement, as filter boxes may vary depending on when the tank was manufactured.The code is located on the filter box lid, or measure it and use the dimensions below to ensure yours matches.