Which is Better: 3 Stage RO or a 6 Stage RO System?

[Sammy S]

I'm finally able to put in my RO unit in my new place. I am putting in a small RO unit and I am trying to figure out if a 3 stage or a 6 stage filtration RO unit would be more beneficial for my tank. Any ideas? What do you use for RO units?

My tank is a 34 gallon saltwater with fish and corals (both soft and hard) as well as snails and shrimp!

[bribo12]

A 6 stage RO is better than a 3 stage. There are more filters and thus more is taken out. However you really want a RODI unit over just an RO unit. The de ionization membrane really takes out a bunch of crap. You'll also want it to have a TDS meter