this is a great ro/di unit for the saltwater reef hobbiest.
It is quiet very easy to install. (even for a tech challenged person like me)
The intructions included made it easy.
the filters last as well. I am just now replacing my sediment and carbon filters after 9 months of very hard use. i produce about 15 gallons a day using this system for my 250 gallon aquarium. Pluss since my unit is under my sink i installed the faucet conector. I use the water created for all my cooking needs and m wife uses the water to wash her hair. (10 times better than britta filters)
I would recomend to everyone.
GET THIS ONE

Rating: [5 of 5 Stars!]