I currently am setting up my 90g SW tank and I recently purchased an RO/DI unit from one of our members. I couldn't be happier with the unit and the customer service Mark has provided. I highly recommend. http://www.melevsreef.com/rodi.html said:That's the same one I have had for almost a year and it works great. Marc is always willing to help with it when he can too.
You can always add another sediment filter as an additional canister before the main unit? I know it's 6 of this half dozen of the other said:I don't either, I thought the water had more gunk than that. I edited above, it has two charcoal filters and one sediment filter.
I've also heard the suggestion to use a 75 gpd for some reason.
I don't either said:the 75 gpd RO membranes have the same dissolved solids in the outbound good water as the 50 gpd membrane, just a larger surface area so they can make more. The 100gpd membranes allow more dissolved solids through them. So in essence, the 75gpd is the most efficient.