[Wide Compatibility – Perfectly Matches Popular Models]​

This 16-pack of filter cartridges is designed for seamless replacement and is fully compatible with the Tetra Whisper Bio-Bag series (including the 10i, IQ10, and PF10 models) as well as the ReptoFilter 20-gallon filter. Whether you use a small desktop aquarium or a medium-sized fish tank, these filter cartridges are plug-and-play, requiring no complicated modifications. They strictly adhere to the original filter housing’s dimensional standards, ensuring a tight fit that prevents water short-circuiting, allowing every drop of water to effectively pass through the filter media and maintain a clean living environment for your beloved fish.

【Dual-Layer High-Efficiency Filtration System – Physical and Biological Purification】​

Each filter cartridge is designed with high-quality medium-density filter floss, offering exceptional mechanical filtration capabilities. It efficiently captures fish waste, uneaten food, algae, and suspended particles, quickly clarifying the water. At the same time, the special texture on the filter media’s surface promotes the attachment and reproduction of nitrifying bacteria, forming an efficient biological filtration layer that effectively breaks down harmful toxins such as ammonia and nitrite in the water. This establishes a stable, toxin-free ecological balance from the source, safeguarding the health of your aquatic pets.

[Economy Pack – Up to 4 Months’ Supply]​

Compared to small, individually sold packages on the market, we offer a high-capacity 16-pack, saving you up to 30% on purchasing costs. Based on the standard replacement frequency of once every two weeks, this single box is sufficient to cover your routine maintenance needs for 8 months (approximately 240 days). This not only reduces the hassle of frequent online shopping or trips to pet stores but also ensures you have ample stock when it’s time to replace the filter media, making it the ideal choice for budget-conscious aquarium enthusiasts.

【Convenient Maintenance and Quick Installation – Saves Time and Effort】​

Designed specifically for those who prefer a hassle-free experience, this “open-and-replace” feature eliminates the need to wash dirty old filter media or cut complex filter materials. Simply open the filter box, remove the old filter cartridge, insert the new one, and close the lid—the entire replacement process takes less than 30 seconds. Additionally, we recommend rinsing the new filter cartridge with warm water from the tank before use to remove any trace dust accumulated during shipping, ensuring crystal-clear water from the moment it’s added.