Water softener water ok? - The Planted Tank Forum
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post #1 of 5 (permalink) Old 12-06-2020, 10:28 PM Thread Starter
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Water softener water ok?

Is water softener water ok for my plants? The GH in my tap water after it’s been softened is obviously 0, but I read somewhere that it might contain some sodium which can be detrimental to my plants. Is that right?

I do remineralize the water with Seachem Equilibrium back up to a GH of 6.
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post #2 of 5 (permalink) Old 12-07-2020, 12:18 AM
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Water softeners replace each Ca and Mg ion with two Na ions, so your softened water has a considerably higher TDS. Plus, you are adding Ca and Mg back into your water with Seachem Equilibrium, which raises the TDS even higher. Your softened water could easily be too salty for many aquarium plants.

The general consensus is to not use softened water for planted tanks.
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post #3 of 5 (permalink) Old 12-07-2020, 03:50 PM
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It's not the end of the world if you have to use GH boosted softened tapwater. Is it ideal? no, but is it fine to use? Yes:

90 gallon, 15dKH, 6dGH, 500+ ppm TDS, fish / neo shrimp thriving and breeding:


20 gallon, 15dKH, 1-2dGH, 500+ ppm TDS, fish / neo shrimp thriving and breeding:
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"No Ice? Just Freeze Some Water"


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post #4 of 5 (permalink) Old 12-07-2020, 05:07 PM
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Buy a TDS meter. They are pretty cheap off of amazon (lots of good ones under 15 dollars shipped) and pretty useful. Measure your tds and you will know the answer. Have a tds over 1000? Might have some issues.



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post #5 of 5 (permalink) Old 12-07-2020, 06:01 PM
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Quote:
Originally Posted by Quagulator View Post
It's not the end of the world if you have to use GH boosted softened tapwater. Is it ideal? no, but is it fine to use? Yes:
+1.

I have softened well water and got along just fine for a long time with it.

Switched to RO and things got even better. But it's a matter of degree.
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