Aqua-Series - Ozone Resistant 1" Oblong Diffuser Stone and Tubing Set--3 Gray Stones (with Bonus)

For convenience and value, purchase the combo pack--1" Ozone Resistant Oblong Diffuser Stones (3 gray stones) and tubing (two 36" pieces of soft silicone).  Purchase Now to Receive a Special Bonus! Now, buy any combo Stone and Tubing set for $19.99 and get three ozone-resistant diffuser stones--FREE! (As Pictured--while supplies last) Add to your stones. Since you need to change stones frequently, this opportunity is a great way to save money and time. Diffuser stones evenly distribute ozone into water. We offer round and oblong stones; fine white and coarse gray stones. These stones both work fine with water applications. The white stones produce finer, smaller ozone gas bubbles than the gray stones. Please Note: This combo set is an official accessory for the Aqua-6 and Aqua-8 Ozone Generators designed by A2Z Ozone. Directions: Insert tubing into the ozone out port on the unit. Place the other end of the tubing around the plastic part on the stone. Insert the stone into liquid. Turn