Amazon.com: ceramic air stone
Pawfly 8-Inch Air Stone Disc Bubble Diffuser with Suction Cups for Hydroponics Pond Aquarium Fish Tank Air Pump. 4.4 out of 5 stars 31. $17.99 $ 17. 99. Get it as soon as Wed, Jan 15. FREE Shipping on orders over $25 shipped by Amazon. Vitruvi Stone Diffuser, Ceramic Ultrasonic Essential Oil Diffuser for Aromatherapy, White, 90ml Capacity.