WelshJoe Posted August 4, 2021 Share Posted August 4, 2021 I have a RO unit I use to make softer water for some wild bettas. I have some Guppies outside in a tub at the moment and I was wondering if I could use the "waste" water outlet (8 in the photo) as regular de-chlorinated water to fill this up without using a chemical dechlorinator. Does anyone see any issues with this? Link to comment Share on other sites More sharing options...
Andy's Fish Den Posted August 4, 2021 Share Posted August 4, 2021 The waste water will just have a much higher TDS and contain all of the minerals or whatever is being filtered out by the RO membrane. Link to comment Share on other sites More sharing options...
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