Questions on RO/DI

kellig

kellig

Member
I have well water. I know I need a TDS meter.
My question is is that a difference between RO and RO/DI?
If so which is better?
I have been buying my water (DI) from the store right now, but know I need a unit.
Our well is 370 Ft deep and I know has been drilled through a ton of limestone, so obviously calcium will be a factor as well......
I have also seen an additive to put in the water after it has been "processed"--is this necessary after you add the salt to it???

Thanks,
Kelli
 
tr1gger

tr1gger

Member
RO/DI
Reverse Osmosis DeIonization
Deionized water which is also known as demineralized water, DI water or de-ionized water; also spelled deionised water, is water that has had its mineral ions removed, such as cations from sodium, calcium, iron, copper and anions such as chloride and bromide. It should be noted that deionization does not remove the hydroxide or hydronium ions from water; as water self-ionizes to equilibrium, this would lead to the removal of the water itself.
Hope that helps you and happy tanking
 
snickers104

snickers104

Member
DI water usually refers to water that has been put through a mixed bed demineralizer. RO water refers to water that has been put through a Reverse Osmosis membrane. The RO water is much "cleaner" (lower TDS) than DI water. I have a home unit that I use as drinking water that is plumbed into my icemaker and I use it to top off my tank, It is a 100 GPD RODI unit meaning it has a carbon filter followed by two sediment filters then flows through the RO membrane THEN it flows through DI resin then out. I hope that makes sense.
+1 for what tr1gger said
 
texasmetal

texasmetal

Active Member
And no, you don't need to add anything to the water after it's been processed. Just salt mix unless it's for topoff.
 
aztec reef

aztec reef

Active Member
the difference is that ro/di takes the filtration process to another level..
Ro units remove most impurities, and ro/di removes the left over impurities and molecules that were missed by the ro. So in short the ro/di is the purest form of h2o purification..
 
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