The most prudent option is to have your instructors) trained completely and systematically so that: your instructors conduct safe, meaningful training compatible with agency policy; they understand what they are doing and why; trainees understand what they are doing and tend to use their training.
Definition of protist. :  any of a diverse taxonomic group and especially a kingdom (Protista synonym Protoctista) of eukaryotic organisms that are unicellular and sometimes colonial or less often multicellular and that typically include the protozoans, most algae, and often some fungi (such as slime molds)
Protists are one-celled organisms. Symbiotic protists are protists that live with other larger organisms in a mutually beneficial relationship. The anaerobic parabasalid species of protist is an example. Photosynthetic protists are the protists that process sunlight. The dinoflagellates Noctiluca and Pyrocystis are examples of this type of protist. There are also protists that serve both purposes: they are both symbiotic and photosynthetic. The protists zooxanthellae are an example of this type of protist.