GEX Slim Mat Activated Carbon 4 pieces, Bacteria 4 pieces

GEX Slim Filter
?4x Activated Carbon Slim Mats
?4x Bacteria Slim Mats

1?? Activated Carbon Slim Mat
With powerful adsorption, it thoroughly removes the sources of cloudy water, yellowing, and bad odors. Maintains clear water quality and a comfortable aquarium environment free from unpleasant smells. Replacement recommended: once every 2 weeks.
2?? Bacteria Slim Mat
Decomposes leftover food and fish waste with powerful filtration bacteria. Helps stabilize water quality and reduces the burden of water changes. Maintains a fish-friendly environment through biological filtration. Replacement recommended: once every 3 weeks.

I purchased these for my goldfish tank, but I have 4 of each left over, so I am selling them. Thank you for your consideration.