Check the listing for details. Active Aqua Air Stone Disc 4" / 8.5" - hydroponic aeroponics aquarium diffuser. Condition: New. Listed at 15.49 USD. --> Brand New! Active Aqua Air Stone Disc About the product Air stones are an ideal way to add oxygen to your hydroponic growing system. The micropore design energizes the growing solution as it aerates and circulates nutrients. Air stones will extend the life of your nutrient solution, help keep roots healthy, and promote exceptional growth. What's in the Package Additional Images - Active Aqua Air Stone Disc- Choose option above FIVE-STAR SATISFACTION GUARANTEED --> Our company has a reputation for delivering excellent service, ensuring buyers' privacy, and delivering quality products at reasonable, competitive prices. We strive to earn a 5-star rating from every transaction. If you are satisfied with the product and service you receive, please take a moment to leave us positive seller feedback. In turn, we will also provide 5-star buyer feedback when your order leaves our facility. If by chance there was something unsatisfactory about your experience, please contact us, and we'll do what's necessary to remedy the problem and ensure 100% satisfaction! TERMS, CONDITIONS, WARRANTIES & POLICIES ABOUT THE HYDRO STORE Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.