Filter Cartridges - Top Fin Retreat RF-S (Small) 6 ct Refill for Desktop Tank

Top Fin size- RF-S Small Retreat Filter Cartridges 6 count- 6 month supply Use for- * 2 gallon modern betta aquarium * 3 gallon easy-clean glass aquarium * 3 gallon rose gold style aquarium * 3.5 gallon 360 degrees betta glass aquarium Recommended to change filter every 3-4 weeks, so this is around a 6 month supply If you like retro items, and more cool things, please check out our store! Thanks and enjoy!