Quote:
Originally Posted by BC564
You can use it but you will go through your RO filters faster and the waste line from the water softener isnt under any high pressure. The water softener water is actually better to use to feed the RO filters.
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you can use softened water for ro (and it will extend the life of your membrane). but i think his question was about the waste from the softener which will contain salt and mess up your ro if you try to run it through it. I am sure you could run the waste water line out to the garden or a barrel outside to use for something outside but it is not a good candidate for any aquarium related use.