Can adding copepods o phytoplankton introduce pathogens?

[sscg]

Can adding copepods o phytoplankton introduce pathogens? Is really hard to keep an ich free tank I just don't want to kill all my fish.

Someone told that is possible to introduce ich and velvet if I add copepods.

 

[HotRocks]

Can adding copepods o phytoplankton introduce pathogens? Is really hard to keep an ich free tank I just don't want to kill all my fish.

Someone told that is possible to introduce ich and velvet if I add copepods.

That is correct. There is a chance if they came from a system that was infected.