Well ... I sort of agree with that and I sort of disagree, which is why I ask. The ocean may be 1.025 but TDS is not a generic homogenous "thing", any kind of trace element will affect TDS and thus SG and the "composition/make-up" might be totally different. If IO was intended for example to mix at 1.025 but has Mg less than what I want, adding less IO theoretically means less "other stuff" (other than Mg) which might be negligible or it might be detrimental. That's where I'm not sure and was wondering what others are doing.
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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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