medium: KCl vs. NaCl

[Carsten Hohoff]

We have several kg of KCl (analytical grade) left - can we use it
in bacterial media (E. coli) instead of NaCl?

Has anyone ever tested different alkali chlorides for
growth of bacteria (esp. E. coli)? Is the alkali ion important
or just the ionic strength?

I wondered, why e.g. terrific broth (TB) contains potassium phosphate
instead of sodium phosphate...

Thanks for any comment -  based on own experience or theory

Carsten Hohoff