Review on 💨 3-Inch Rhinox Aluminum Alloy CO2 Bubble Counter for Milwaukee Solenoid Regulator: High-Quality Aquarium Diffuser & Regulator (Aluminum Alloy) by Jasmine Hart

Arrived quickly but in poor condition. The unlabeled box barely closed, leading me to believe it had already been opened. The plastic has scratches and stains on the inside. There's also a random rubber o-ring that doesn't have instructions on where it should be. When it was delivered it was just inside, as shown in the photos. The article states that there is a built-in check valve. Now I haven't tested it, but when I unscrewed the bottom cap I found that there was only one spring sitting there. Without holding anything, without pressing anything, we just sit there. If I don't see something, it looks like false advertising. I would like a response from the seller if any of this information is unexpected.