vertex rodi unit question?

[burtonpj48]

Hello everyone! I am looking to get a rodi unit. I am very interested in purchasing the vertex puratek 100 gpd unit. I was wondering if the filters are standard size and can be purchased anywhere. Or are the filters a special order item. I was looking at a rodi unit hir in calgary and the company said they could custom make me one, Dealing locally would be good as long as the filters are readily available. I was also told, rodi are relatively all the same, ro takes out 90 % and the di is just a little more. I would just like to get input on those of you reefers, who use rodi before i decide which one to buy.