R/O Water Softener Water - The Planted Tank Forum
 
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post #1 of 8 (permalink) Old 07-04-2013, 10:10 PM Thread Starter
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R/O Water Softener Water

I have a water softener that uses salt to clean the water. I also have a 4 stage RO unit after the water softener.
Question--Will the water softener water be OK to use since it is going through an RO unit? I'm wondering if the RO unit is removing the salt that's added to the water from the softener.

Thanks for any responses.

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post #2 of 8 (permalink) Old 07-04-2013, 10:20 PM
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Yes that is the correct and common way to do it.

Technically the water softener isn't really supposed to add much if any salt to the water, but some might slip through. I noticed the salt bad with my new softener for the first couple of regen cycles, but its got a lot better since.

Supposedly the sodium is a lot easier on the RO units than the calcium, so its not a big deal.
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post #3 of 8 (permalink) Old 07-04-2013, 10:56 PM Thread Starter
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Thanks for your input.

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post #4 of 8 (permalink) Old 07-05-2013, 01:01 AM
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And if you are really worried about sodium chloride, you can use potassium chloride instead. It's about 4x as expensive, but it's also good for your plants. That said, the RO unit should remove it anyway.


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post #5 of 8 (permalink) Old 07-05-2013, 04:18 AM
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the harder the water, the more sodium there will be in your softened water (it's ion exchange, calcium and magnesium for sodiums). starquest is spot on, RO will remove them all but sodium is easiest on the membrane.
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post #6 of 8 (permalink) Old 07-05-2013, 05:02 AM
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I am currently looking at getting an RO unit and was wondering the same thing if it should go before or after the softener.
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post #7 of 8 (permalink) Old 07-05-2013, 03:01 PM
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Quote:
Originally Posted by The Big Buddha View Post
I am currently looking at getting an RO unit and was wondering the same thing if it should go before or after the softener.
definitely after
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post #8 of 8 (permalink) Old 07-05-2013, 03:04 PM
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After the softener.

If you read this thread, you'll see that you want the RO/DI filter to remove any sodium.


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