Review on 🐠 Yagote CO2 Glass Aquarium Supply Essentials: CO2 Diffuser, Drop Checker, Bubble Counter & Check Valve for Lush Aquarium Planted Tank by Tiffany Love

Pretty strong stuff. But. It can take a lot more pressure than you think to open it. I can try again and assess whether or not that tiny bit is the cause of the headache next week. Basically you can't mouth blow at the end of the feed unless you're performing pressurized gas. So it can stay or be repurposed somewhere soon.Addendum: The decision to return the item has been made. Basically the set pressure (remove/open) was too high for my 5lb tank regulator so they go back to where they came from. The set pressure on these valves should be in the description instead of "high pressure", I think 1 atm. 14psi so 5psi is low pressure but yes it would be better if I knew the actual pressure in advance. This will work if your feed line is 1015psi or so, if the regulator is set to 5 and used on a nano tank it may not work.