It's hard to say. 0.02ppm is probably a good enough level for a reef tank although I wouldn't want it any higher - however I'm specifically wondering if someone could measure their RO/DI and tell me what it is (in ppb). 11ppb is 0.01ppm so it's a very low value but I would have guessed it should be 0 outright - it's not - but without a baseline of comparison it's hard to know for sure.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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