Check the listing for details. GrowoniX EX / GX 100 200 300 400 Replacement Carbon Sediment Filter Membrane. Condition: New. Listed at 45.59 USD. Filters come in sealed packaging NEW 3 Filter Set - Growonix EX / GX 100 200 300 400 Replacement Carbon, Sediment Filter and RO Membrane 100 GPDPackage Includes: 1 - Growonix RO Carbon Filter - This filter contains activated carbon, a substance that has a surface area of over a football field per gram. This filter purifies water beyond what most home filters are capable of, yet it is only a pre filter for the advanced RO membrane. 1 - Growonix RO Sediment Filter - This filter removes large and medium sized debris from your water source. It is the first filter in the system and should be replaced or rinsed regularly. 1 - Growonix RO HF Membrane Filter 100 GPD- The RO Membrane filters water down to the microscopic level, allowing nothing bigger than a water molecule through. Product Features Package Includes: Growonix RO Carbon Filter - This filter contains activated carbon, a substance that has a surface area of over a football field per gram. This filter purifies water beyond what most home filters are capable of, yet it is only a pre filter for the advanced RO membrane. Growonix RO Sediment Filter - This filter removes large and medium sized debris from your water source. It is the first filter in the system and should be replaced or rinsed regularly. Growonix RO Membrane Filter - The RO Membrane filters water down to the microscopic level, allowing nothing bigger than a water molecule through.