Flava - that is the one you want. 
Here is a study that says TT does not affect the sodium balance.
Vet Res Commun. 2003 Jan;27(1):53-62.
Laboratory findings on weekly samples indicated significant differences in white blood cell count, total plasma protein and fibrinogen, total and direct bilirubin, blood urea nitrogen and creatinine concentrations. There were no significant differences in the packed cell volume, in the neutrophil, lymphocyte or eosinophil counts, or in the serum calcium, phosphorus, potassium, sodium or chloride concentrations.