I have the 5 stage "plus" from Bulk Reef Supply. It's an excellent unit. Easy to install, good quality see through cannisters. As a plus it came with some extra's that proved to be helpful over time for me.
I have it set up to make RO water for the house and RODI for the tank.
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Mark...
290g Peninsula Display, 425g total volume. Setup Jan 2013.
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