Question, My buddy gave me a nice RO system and I am getting 30-33 TDS. Is that ok for my salt water aquarium. I have been getting my water from the grocery store, they clam it RODI water. I have never tested it and my tank has been fine, I am going to test it tomorrow to really see. But I would like to use this RO I got but its saying 30-33 TDS. Will that work for my tank.
Thanks
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