Hey guys, I have a merlin ro unit rated at 720 GPD. It doesn't have a DI filter on it though, so I'm looking to add on in there to make the water even cleaner. The only question I have is how do I determine which DI filter I need or which one will work with my RO unit. My main concern is the DI filter will not be able to handle the higher flow rate since most RO/DI out there are only around 150-300 GPD, or does the flow rate not matter when it comes to DI filters. Any advise will be helpful. Thanks