【Check Size Before Purchase】Compatible with EF-S and BF5 BETTAFLO filter systems only; actual size: 3.76 x 1.97 in; overall width with pull tab: 2.44 in; thickness: 0.39 in; measure your old and filter chamber before ordering

【Multi-Layer Filtration for Clear Water】Made with high-density filter and activated carbon, this aquarium filter helps debris, impurities, and remove unwanted odors, keeping your water clean and

【Replace Every 2–4 weeks for Results】To maintain optimal filtration performance and water quality, it is recommended to replace the fish filter every 2 to 4 weeks, depending usage and conditions

【Easy Installation & Quick Activation Tip】 rinse the under cool water for 30 seconds to remove any transit dust, and if the carbon beads have shifted to side, a gentle shake will redistribute them for uniform filtration ; then, insert it directly into the filter chamber—no tools needed, making it even for beginners.

【Durable & Fish-Safe Materials】 Each EF-S aquarium filter is made from durable, fish-safe materials, providing reliable filtration while supporting a aquatic for betta fish and other small species.

【Durable & Fish-Safe Materials】 Each EF-S aquarium filter is made from durable, fish-safe materials, providing reliable filtration while supporting a aquatic for betta fish and other small species.