Koller Products Replacement Filter Cartridges - Small 6-Pack

Replacement filter cartridge fits Koller Products aquariums and Hawkeye aquariums with power filters using filter cartridges size Small. Keeps water crystal-clear and fish healthy by removing organic pollutants and other fish waste. Fits Koller Products and Hawkeye power filters for the following aquariums: AquaTunes 2.5-gallon Aquarium with Sleep Sound Machine (B00HH7UVYO) AquaTunes 3.5-gallon Aquarium with Sleep Sound Machine (B00HH7UW1Q) AquaView 3-gallon (B01M4LNYWS) 4.5-gallon Aquarium (B01JS39E60) 5-gallon Aquarium (B00KIRR8BY) 6-gallon 360 Aquarium (B007R5C6CG) 6.5-gallon Aquarium (B0182CAHWS) 7-gallon Aquarium (B01JS2NNJA) Smart Tank 5-gallon Aquarium Smart Tank 6.5-gallon Aquarium (B086D9B85Q) and Smart Tank 7-gallon Aquarium (B0865LG56Z). Comes with 6 ready-to-use replacement filters cartridges.