I am involved with 3 species of copepods, Tigriopus califoricus, Tisbe and Pseudocyclops. We recommend the Tigriopus for target feeding and the other 2 for seeding fuges.
We found in the summer, the Tigriopus culture would dwindle so that we almost had to stop production. When a chiller was placed on the system, there was a stable production all year round. Predation and nutrition were not issue in our situation. There are peeps like Ron Shimek who agree. Temperature went up - production went down. The temperatures dropped - production went up. Put on a chiller - year round equal production.