SW PRODUCTS Koller Products XS 6-Pack Filter Cartridges, Replacement Cartridge for Koller Products Fish Tanks

HIGH EFFICIENCY FILTERING - This fish tank filter cartridge is made of high efficiency filtering material, which can capture tiny particles and bacteria, providing all-around water protection and keeping you away from water pollution.

MULTI LAYER - The innovative 3-layer filtration design provides multiple protection. The primary cotton layer effectively captures large particles of impurities, the middle activated carbon purifies in depth, and the final cotton layer further filters fine particles to ensure optimal water quality.

ACTIVATED CARBON PURIFICATION - The filter cartridge is built-in high-quality activated carbon, every drop of water is thoroughly purified, removing odors and harmful substances, so that fish can enjoy a pure living environment as in the beginning. Keep the water quality stable and protect the health of fish.

Size Extra Small - Compatible with power filters for various aquarium sizes, including Koller Products 1.5-gallon, 2-gallon, and 3-gallon fish tanks. (Product may ship in white SIOC packaging depending on demographic region)

NO ASSEMBLY REQUIRED - Our filter cartridges for fish tank simply need to be rinsed with cold water to remove external dust and then placed completely into the filter chamber. Replace cartridge every 3 to 4 weeks or when filter flow is diminished.