ok, so I would assume that most us use ATO and yes we shoot for 1.026 sg, but undestanding what makes up that sg is another story. without proper calcium, magnesiium and alk levels, if you shoot for an sg of 1.026 all it is is extra salt when it should be a total meaurment of yes sodium cl, but more importantly....and the reason when shoot for 1.026 in the first place is those calcium, mg,alk levels. I am willing to bet your calcium and alk are vey low in relation to sodium. and if you are to raise those levels understand that your sg will go up accordingly. just saying, as you said you don't test I am stating an educted guess.