Having the culture water turn clear in color is not a 'bad thing,’ but it is something we should try to avoid. If this does happen, we are left with two options:
1) Add more phytoplankton to the culture tank to return the water to a green color.
2) Drain the tank through a strainer (53 micron works well), and then backwash the copepods into the culture tank with fresh phytoplankton. When draining the tank, I use a small diameter rigid tube to siphon out the water and copepods. When draining/siphoning the tank, try to minimize the amount of 'gunk' that is siphoned out.
