The halophiles grow in environments of high salt concentrations where other organisms cannot and this is how to isolate them. I had tried to grown halophiles from fish sauce and also from a salt water solution. On the halophile medium I received many dark shaded colonies. Upon gram staining I received gram negative cocci that did not produce spores. But what I would have continued with would have been to streak the halophiles onto plates of varying salt concentration and observe whether the halophiles grew or not.
Halophiles accumulate great amounts of potassium in order to stay hypertonic to their environment.
The enzymes, ribosomes, and transport proteins of Halophiles require high levels of potassium for stability and activity. I also would have use motility agar to tell whether the organism was motile, but halophiles are non-motile. Finally, when I received what I now know as being the signing sheet. I thought that it was a check off list as in the unknown lab. I was not aware until the final lab period that I was supposed to have gotten the sheet signed whenever I had completed a step.