What prevent growth in H2O bath?

[F. Frank LeFever]

In <3.0.3.32.19980322150423.0092d2b0 at galenos.uio.no>
eva.kallberg at labmed.uio.no (Eva =?iso-8859-1?Q?K=E4llberg?=) writes: 
>
>What do I pout in my water bath to prevent growth? Without harming my
>colleagues. 
>Thanks
>EVA
>
First: what kind of growth?

Second: how many colleagues will be sharing your bath?  All at one time
or across a period of time?  How big is your bath?

Frank