Review on 🌊 VIVOSUN 5" Hydroponics Aquarium Tank Pump Air Stone Disc with Shell by Monica Hale

Unfortunately neither of the two stones I ordered fit: They had noticeable glue on the plastic sides, one stone even had traces of glue on the active side. Air escaped through the sides, not through the stone. I assume that is why the adhesive was applied to the defective product, but this issue has not been resolved. I also had a couple of suction cups as expected in the picture. Instead I got a double sided suction cup which failed to hold the stone securely in place.