So, I have found a 7 stage RO/DI unit from this site called AquaSafeCanada for about $130.

Here are all the levels of the filter:

Aquarium II System Combo

• First stage: (SED; 5 Micron Sedimentary Filter)
• Second Stage: (GAC; 5 Micron Granular Activated Carbon for Chemicals)
• Third Stage: (CCB; 1 Micron Coconut Carbon Block For Chemicals)
• Fourth Stage: (100 GPD Reverse Osmosis Membrane)
• Fifth Stage: (Demineralization by Ionization DI Resin Bead Filtration)
• Sixth Stage: (Demineralization by Ionization DI Resin Bead Filtration)
• Seventh Stage: (Demineralization by Ionization DI Resin Bead Filtration)

I am worried about the quality of this product, is it a cheap knock-off or will it do the job?

Here are the links on their site and ebay.

Any ideas or experience with this filter?

Thanks!