Tetra Whisper Iq Filter External Aquarium Filter - 20 Gal

• Flow control-reduce as low as 20 gph for bettas plants feeding or other low flow needs
• Soundshield-A soft barrier seperates the motor from the filter to minimize noise
• Adjustable intake-telescopes up or down to fit your aquarium's needs
• Smart Path Spillway-oxygenates the water and agitates the surface
• Bio scrubber-cultivates aerobic bacteria which remove toxic ammonia and nitrate