Add Stone Airstone Pet Supply. Pet Supply » All Pet Products » Tropical Fish » Ponds » Accessories » Equipment » Air Pump » Air Stones Air Pump • Air Diffusers Air Pump • Air Line Tubing Add-a-Stone Airstone - 10 in. buy bestselling pet products, supply find reviews, ratings, prices Price: $3.89 Features • 2 " x 10 " • Requires air pump and airline tubing. [ + Zoom ]   [ Buy Now ] Pet Products : Usually ships in 1-2 business days Add-a-Stone Airstone - 10 in. Customer Reviews   1     2   ♥♥♥♥♥ Great Airstone! I ordered two of these for my 30 gallon fish tank, they're very nice airstones!   1     2   Non User