filter vs. deionizer vs. RO ?

[copi]

What is the difference between a tap water filter, a deionizer, and reverse osmosis? Are there pros and cons to each?

Thanks : )

 

[Bang Guy]

Tap water filter is a deionizer. Reverse Osmosis is a mechanical filter that will remove about 95% of impurities from tap water. Not good for Phosphate or Silicate but really good for almost everything else. If you run the output of a RO through a DI then you'll remove almost all the Phosphate and Silicate as well.

DI beads (rosins) are expensive so using a RO first cuts down on expenses.