![Amazon.com: Marina Slim Filter Carbon Plus Ceramic Cartridge, (3 Pack) , 3 Cartridges each : Everything Else Amazon.com: Marina Slim Filter Carbon Plus Ceramic Cartridge, (3 Pack) , 3 Cartridges each : Everything Else](https://m.media-amazon.com/images/I/81aFOs4s4CL._AC_UF350,350_QL80_.jpg)
Amazon.com: Marina Slim Filter Carbon Plus Ceramic Cartridge, (3 Pack) , 3 Cartridges each : Everything Else
![Amazon.com: Marina Bio Clear Ceramic Replacement Cartridge for Slim Filters, 3 Pack – Optimal Filtration for a Healthy Aquarium,White : Everything Else Amazon.com: Marina Bio Clear Ceramic Replacement Cartridge for Slim Filters, 3 Pack – Optimal Filtration for a Healthy Aquarium,White : Everything Else](https://m.media-amazon.com/images/I/71ynosIiuEL.jpg)
Amazon.com: Marina Bio Clear Ceramic Replacement Cartridge for Slim Filters, 3 Pack – Optimal Filtration for a Healthy Aquarium,White : Everything Else
![Amazon.com: Marina Slim Filter Carbon Plus Ceramic Cartridge, (3 Pack) , 3 Cartridges each : Everything Else Amazon.com: Marina Slim Filter Carbon Plus Ceramic Cartridge, (3 Pack) , 3 Cartridges each : Everything Else](https://m.media-amazon.com/images/I/81ivkDBjKhL.jpg)
Amazon.com: Marina Slim Filter Carbon Plus Ceramic Cartridge, (3 Pack) , 3 Cartridges each : Everything Else
![Wanted to hack my Marina Slim HOB so I don't have to buy their filter cartridges. New to the hobby, any advice as to filter medium to replace the cartridges with? This Wanted to hack my Marina Slim HOB so I don't have to buy their filter cartridges. New to the hobby, any advice as to filter medium to replace the cartridges with? This](https://preview.redd.it/wanted-to-hack-my-marina-slim-hob-so-i-dont-have-to-buy-v0-299xzp1i2gfa1.jpg?width=640&crop=smart&auto=webp&s=8ee03170bf9022f3e4648df1550c5430f105cea5)