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What are your thoughts on RO - RO/DI water for freshwater planted tanks?

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I have an RO/DI unit that I am currently using for both my fresh and salt tank. I want to switch back to tap for my FW because I plan on stocking it a little more densly with plants. Currently I have Java moss and Fern which really don't care what they are immersed in. My tap gives me a TDS of 160 ppm, which looks about half of what Edward stated for his tap.
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