Aqueon Filter Cartridge Medium 6 Pack so ensure a stable rock

so ensure a stable rock structure to prevent collapses

Calcium Iodate]

Cozy hideout tunnel and lofty lounger on top

making them entertaining to observe

Aqueon Filter Cartridge Medium 6 Pack so ensure a stable rockAqueon Replacement Filter Cartridges are dual sided, featuring dense floss with over 25% more activated carbon than the leading brands. These patented cartridges were designed to ensure even distribution of activated carbon. To use, simply rinse under cold water and easily install using the "FRONT" orientation tab. Aqueon Replacement Cartridges are available in: X Small, Small, Medium and Large. Replace cartridges every 4 weeks for optimal performance.