Waycreat4 Inch Aquarium Air Stone for Fish Tank Bubble Stone Diffuser for Aquarium and Hydroponic, 2 Pack

I ordered the twin pack the overall quality of the product is really good but unfortunately one of them was defective one of the outlet valves was broken on thankfully Amazon resolved it for me I would recommend this product but check on receipt of delivery

1 of the 2 arrived with a broken valve so was refunded. The one that works is great

Excelente producto. Funciona sin problemas y un poco mas grande de lo que imagine, pero perfecto para pecera de 70gal

Air stones were of decent size and produced perfect bubbles for aquaponics tank. Using 1 on each side of tank created perfect circulation.

Bigger then described suction feet work great my fish love it