Culligan Machine at Grocery store.. is it RO/DI

[Jme]

like the topic asks.. anyone know if this is RO/DI water out of the "Culligan" machine at the store? It says its filtered through carbon, then a membrane and then its put through a UV filter. Just making sure this is good for my tank?

 

[melosu58]

From your description it sounds like RO water.

 

[Sadielynn]

I would recommend that you ask the store manager or call the culligan that is responsible for the care ot that machine , they will tell you if it is or not ...Then ask to see the maintince log to make sure it is regularly serviced ...

 

[alaher2]

We don't have a Culligan Machine in our area, but Im assuming if it's anything like ours they are just tap water filters, which still uses a membrane but doesn't deionize the water like a RO/DI unit does. But then again....I might be wrong, so lets hear what everyone else has to say.

 

[melosu58]

If it has a membrane then it is likely an RO system. How good it is set up and kept up is a good question. You might want to get a sample and test for nitrates and phosphates.

 

[Sadielynn]

If it has a membrane then it is likely an RO system. How good it is set up and kept up is a good question. You might want to get a sample and test for nitrates and phosphates.

Good point

 

[mazilla]

i have a similar machine near my house, there was a last serviced tag on it. it read 04, so i went to the water store instead, it's only .30 a gallon and i know it's good.

 

[Buckeye]

Those machines are designed to produce drinking water - they use RO, but no DI.

Russ @ BFS

 

[Jme]

So, excusing my ignorance, RO (reverse osmosis) is the passing of water through a membrane to remove any particulate matter, and DI (de-ionization) is removal of phosphates and other impurities? Because the water machine says it uses carbon filters, isnt this how you De-ionize water by using activated carbon? Sorry, as you can see im certainly no expert....

 

[Buckeye]

Jme - you're generally on the right track, but not quite.

Carbon is used ahead of TFC RO membranes to remove chlorine and other volatile organic compounds.

Reverse Osmosis uses a semi-permeable membrane to filter out 90%+ of molecules larger than water. So it filters out particulates down to the molecular level.

Deionization is typically used as a polishing stage after RO. It captures ions that made it through the RO membrane.

 

[packagerat]

The Culligan store in my area says that there water they sell in the store is not RO water. I was going to use it to start my tank till they told me. They said there water was only run thru carbon filters.So I would assume it is not RO water.