If you're the owner of certain delicate species like goldfishes or have older fishes, you would know they might be sensitive and reliant on a steady environment with the right CO2 levels and water direction. Any change in these elements could cause them stress. This is why having a sturdy and reliable check valve is of utmost importance.

Rhinox High Quality Brass Check Valve is made from brass, so it doesn't bend, break or rust like plastic check valves might. Simply install it correctly by making sure the arrow is pointing in the right direction, and use tubings that have 4mm inner diameter and 6mm outer diameter. Rhinox Check Valve has proven to be anti-leak, anti-backflow and is consistent in providing aquariums with keeping water flowing in one direction.

Note that Rhinox High Quality Brass Check Valve is made for CO2 systems and not air pumps. For the best results, follow the instructions and ensure your fishes live a happy, healthy and stress-free life!

• HIGH QUALITY BRASS VALVE - Rhinox Brass Check Valve is made from sturdy brass that doesn't bend, break or rust, unlike plastic check valves.
• ANTI-LEAK, ANTI-BACKFLOW - When installed correctly (check the arrow on the piece to know the correct side), Rhinox Brass Check Valve ensures that the water and air circulations are consistent and going in the right direction without any backflow. Great for sensitive fish species.circulations are consistent and going in the right direction without any backflow. Great for sensitive fish species.
• FOR CO2 SYSTEMS ONLY - Made specially for CO2 systems and NOT air pumps. Fits tubing with 4mm inner diameter and 6mm outer diameter for best results.