Aquarium filter elements in total， Compatible with Aqua-Tech EZ-Change # 3 Aquarium Filter， fit for 20-40， 30-60 power filters.12 filter elements can meet your daily needs. The use of high-quality material filter element can effectively filter out impurities in the water， ensure the quality of the water in the aquarium， and provide a more comfortable living environment for your pet. The use of the filter element is also very simple， and the operation steps are simple. Filter elements save you time while also giving you peace of mind.

• Compatible with Aqua-Tech EZ-Change #3 Aquarium Filter，fit for Aqua-Tech 20-40 and 30-60 power filters.Please confirm the model before purchase to avoid buying wrong!
• The aquarium filter traps fine dust，cleans the water to a crystal clear condition，and keeps the fishy smells away from your house when there is a tank.
• Regular replacement to keep aquarium filter in high level performance.Changing the filter cartridge every 2-4 weeks would be recommended.Rinse the filter before puttin them into the tank.
• The charcoal material inside can prevent odor， water discoloration and impurities from your aquarium，provide clean and fresh water for healthier fish.