Aquarium Stainless Steel CO2 Diffuser Widen Hook, DCW300-40

If the tubing slip connector with check valve hadn't been installed backward to prevent CO2 flow and wasn't jammed so hard onto the stainless steel tubing, it would have been a very pleasant installation experience. When I first installed and hooked it up, the bubble counter showed flow, but after a few minutes, the flow stopped. After reviewing all of the photos, I decided to reverse it because there appeared to be an obstruction and all the pictures show the thicker collar at the top. But pulling the plastic ring down while pulling on the stainless steel, it refused to budge. So I got some pliers after it and gripped the plastic ring and the connector and was able to remove it. Sure enough, when reversed 180, the connector easily slid onto the steel tubing and gripped it well. By pulling the plastic down and pulling up on the steel tubing, it was easily removed. After connecting everything up again, I can say it works well.

Excellent, bubbles are so fine

The product works very well, but you have to be vigilant. I tried using it with the same tubing I had connected to my inline CO2 system. Nothing came out; I disassembled it and removed the ceramic disc - still nothing. I blew through the tube, and it was clear. The solution was to submerge the whole unit in water, where I discovered that the inlet connection was loose - the CO2 was leaking out right there. I grabbed a piece of tubing from a spare pump, installed it, and everything worked perfectly.

Clean look for the tank. Have two runing in a 90 gal.

Quality on point, best product for the value.