The AquaLabs Micro Mist diffuser is engineered with a high-pressure membrane requiring 45psi for proper functionality. This high pressure requirement allows for an ultra fine CO2 mist that cannot be achieved with standard diffusers. Built with durable stainless steel, this diffuser allows for maximum CO2 absorption by plants. Keep your AquaLabs Micro Mist Diffuser performing at its best with our Replacement Membrane, designed specifically for high-pressure CO₂ systems. Over time, diffuser membranes can become clogged with algae or debris, reducing efficiency. Replacing the membrane ensures a consistent ultra-fine CO₂ mist, maximum absorption, and long-term reliability of your diffuser. Key Features Replaceable membrane High-pressure functionality Bonus stainless steel U-bend Please Note Only for use with regulators that have an adjustable working pressure Replacement membranes are only compatible with AquaLabs Micro Mist Diffusers. Soak in water for at least 1 hour before use.