Czarixa Small Filter Cartridges Compatible with Koller Products Aquarium Internal Power Filters 2.5 to 7 Gallon, Small Fish Tank Replacement Filter Carbon Cartridges for Clean Aquarium Water, 6 Pack

Filter Cartridge Replacement for: This pack of 6 small fish tank filter cartridges fit for Koller Products aquarium internal power filters. This size s filter fits a wide range of popular aquarium models including AquaTunes 2.5-gallon, 3.5-gallon Aquarium with Sleep Sound Machine, AquaView 3-gallon, 4.5-gallon, 5-gallon, 6-gallon 360, 6.5-gallon, 7-gallon, and Smart Tank 5-gallon, 6.5-gallon, 7-gallon aquariums. Measuring 4.72 x 2.17 x 0.63 inches / 12 x 5.5 x 1.6 cm, these small aquarium filter cartridge ensure compatibility with your fish tank accessories

Three-Stage Filtration: The first cotton layer of the fish tank filter cartridge filters out physical waste like uneaten food and plant matter. The small filter for fish tank's inner layer of high-grade activated carbon chemically decreases dissolved pollutants, odors, and discoloration, and the final precision layer captures micro-particles, guaranteeing superior water quality

Maintains Steady Water Flow: Fish tank filter cartridge small for Koller are well-designed with minimal toner leakage, and the evenly distributed cotton won't impede the normal flow of water, not affecting the fish and turtles in the aquarium

Easy Maintenance: No more soggy hands or complicated steps! These small replacement cartridges are 100% ready-to-use. Simply swap out the old filter cartridge for a fresh one in seconds. The "No Getting Hands Wet" design makes monthly filter maintenance a quick, clean, and simple ritual to ensure optimum aquarium filtration performance

6-Pack Value Pack：Six small replacement aquarium filter cartridges for Koller provide a 6-month supply. To achieve optimal water quality, please change the fish tank filter cartridge every 3 to 4 weeks according to the number of fish in it. Using our small filter cartridges for fish tank helps maintain stable water parameters, and provides a cleaner, safer environment for your fish, leading to less stress and better vitality