Try going into the website aquariumwaterfilters. I believe it is the Barracuda as it only has 3 cannisters. The membrane was used by the previous owner for 6 months, so it is still good as I never used it. She said it was rated for 50 GPD. It has the meter on the side, and a kitchen faucet attachment. I would replace all 3 things that go in the 3 cannisters, like the DI resin and the carbon block etc.