Model: AWB-300 Jetting Volume: 15 Lmin pump power needed >7W and pressure> 0025 MPa such as whissper AP150

Model: AcB-300 jetting volume: 17 Lmin recommended air pump power: > 7 W standard ID airline tubing: 316 inch Ideal for fish tanks aquariums DWc systems or small koi ponds 2 Bubbles Effects: Produce a cascade of fine bubbles under less air input and medium bubbles under strong input Both form a rectangle bubble wall to increase oxygen level in your aquarium Stable in Water: Each bar measures 12 L x 15 W and weighs 4 oz come with an extra suction cup clip which keeps it lying steadily without floating in the water Reliable Material: compressed with sand and wrapped with a plastic base it causes no effect to the health of your aquatics Help keep fish or roots growing healthily Easy to Use: Soak the stone completely in water for 1 hour before use clean it regularly with a brush as it gets clogged after weeks or months of usage