Description Aqua One Betta Sanctuary Carbon Cartridge | 2 packReplacement carbon cartridges for the Aqua One Betta Sanctuary.Carbon cartridges remove harmful substances and toxins from the water of the aquarium, lengthening the life of your fish and allowing the both of you to build more memories together.It is recommended that cartridges be replaced every 8 weeks.Pack of 2. Dimensions: 1cm x 9cm x 15cm
