Most RODI system runs the same way. brand wise most of them are the same. They are canister that allow water to flow through various pre-filter and membrane.
What if I tell you I can DIY a set up exactly like crystal pro and its lower than the selling price of available models in market? Whats the diff between different brand then?
THE USE OF MEMBRANE.
@PowderTang You need to understand the various stages of a RODI unit first. Your existing crystal pro 3 can be turn into a RODI unit with the correct addition.
Stage 1: 5 Micron sediment filter that filter out particles bigger than 5 micron. (i.e. acts exactly like the micron filter in your sump)
Stage 2: Carbon block that de-chlorine the water and remove any organic compound (smell, contaminant and chemical etc)
Stage 3: TFC membrane that removes many other contaminants and this is what restrict the water flow
Stage 4: De-Ionization through resin.
The only diff is the membranes and pre-filters used in each unit and their capacity.
@PowderTang, if you want to add a RO membrane into your existing unit, you need to get this to house the above RO membrane. Cost just a few bucks if you know where to get.
And than get this to hold the canister:
So where can you buy all this? Our boleh neighbour have most of the things in their departmental store. The rest? Taobao lo.
PS: I can fix up a unit for you at lower than retail price, with USA made membrane. PM to express your interest for a 4 stage unit. Pricing yet to be conclusive.