Review on 🐠 Aquarium Air Stone Bar: Silent and Subtle 6 Inch Fish Tank Air Diffuser with Control Valve - Ideal for Guppy, Shrimp, Exotic Species! by Bricyan Krzywicki

Air escapes before it hits the stone. I soaked it for two days and when I finally had time to add it to my aquarium I was very disappointed. Tried all air pressure ranges. Think I got a bad one. UPDATE: They sent me a replacement and this stone was not defective. This is exactly what I wanted in my pool! It's worth it if you want to use a fine to medium bubble bubble stone in your pool. With stone and great customer service, definitely a 5 star product.