About This

• 【Perfect Fit】Designed specifically for Fluval U Series Underwater Filters, this replacement for fluval ceramic media seamlessly fits into the filter chambers of U2/U3/U4 models. Each pack contains 110 grams of biological media—replenish only half the amount each time for up to 4 months of filtration performance
• 【Water Purification】Utilizes premium bio ceramic media shaped filter media. Its composite ring structure provides an expansive surface area to adsorb impurities, helping maintain stable water quality. u3 filter replacement Creates crystal-clear water and ensures the healthy operation of the aquatic ecosystem
• 【High-Efficiency Filtration】for fluval bio media ring-shaped porous structure offers a vast surface area to capture larger particles and debris, achieving efficient mechanical filtration. Its pore size design ensures smooth water flow, minimizes clogging, and delivers long-lasting filtration performance
• 【Easy Installation】Remove the middle filter chamber from the U2/U3/U4-series submersible filter. Rinse the new bio-media with tap water or aquarium water, then fully insert the media into the filter chamber. For an ideal fish-keeping environment, replace the u4 filter replacement every 2-4 weeks based on the number of fish in your tank
• 【Suitable for Multiple Aquatic Environments】The U4 Bio-Filter Media is a premium biological filtration medium that delivers exceptional filtration performance, maintains healthy nitrogen levels in the water, and creates an ideal environment for fish and plants in aquariums. It is suitable for freshwater, saltwater aquariums, and other environments