Review on AQUATEK Premium Brass Check Aquariums by Nicole Hefton

From the start it was very difficult for the air to flow through the valve and one day (after a month and a half) it was completely clogged preventing all the air from flowing through. Even after spending extra money looking for a premium product, I found that it wasn't worth the premium price. I bought a very expensive ($150+) regulator from aquatek that worked great when used without a check valve (thankfully the water wasn't circulating back then) but when I bought it to add it completely ruined my regulator .by limiting my CO2 emissions .pass by. DEFINITELY DO NOT BUY THIS PRODUCT.