Antibiotic cocktails

[??]

I am working on the effects of varying osmolarities on cell function
in C.reinhardii using large (8L) cultures.  I have been having a few
problems with contamination of the medium despite taking precautions.
Does anyone have any recipes for antibiotic medium additions that will
kill any bacteria present BUT not affect the functioning of the
Chlamys?

Yours Hopefully

        Karl

        J.A.Raven Lab
        University of Dundee