Tetra Whisper Internal Power Filter 40i Pet Supply. Pet Supply » All Pet Products » Tropical Fish » Ponds » Accessories » Equipment » Filters » Power Filters Filters • Biological Filters Filters • Prefilters Tetra Whisper Internal Power Filter 40i buy bestselling pet products, supply find reviews, ratings, prices List Price: $58.12 You Save: $0 Features • 40i • for 20 - 40 gallon tanks • 170 gph [ + Zoom ]   [ Buy Now ] Pet Products : Usually ships in 1-2 business days Non User