In your area you might not even need a DI stage at all. I thought you folks in greater Van had tap water with a very low TDS to start with. RO might be all you need. Check your tap water TDS with a meter before spending big bucks on overkill filtration, especially DI. See Rogue951's post, he lives in your neck of the woods. Cheap handheld TDS meters are available in Walmart and similar retailers in the RV/outdoor section.
Edit: Aquarium specific RODI systems are not much different, if at all, from generic RODI systems. I purchased mine from BWI and am very pleased with it. Great quality and competitively priced. You can choose from different setups that will better suit your particular needs with respect to source water TDS, rather than buying more than you need just because it's marketed as an 'aquarium' system.
Last edited by mike31154; 12-13-2010 at 03:23 PM.
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