OASE AquaOxy 450 Air Stone and Tubing Set by Oase $ 32.00 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Replacement Air Stones (2) and tubing (2 x 25') for the OASE AquaOxy 450 Pond Aerator. OASE Part Number: 29246