A plastic elbow connector that allows CO2 tubing to be connected from outside an aquarium to inside.

Kinking can easily occur with tubing and this elbow connector avoids such problems. Because the plastic is hard, gas is able to pass through easily without interruption. CO2 can then flow into your aquarium as expected.

Can also be used for air pumps and tubing, again to avoid kinking.

Directions:

Simply connect your tubing to one elbow, and then on the inside connector connect your tubing once again which attaches to a CO2 diffuser or air stone.