I have to jump in here real quick and address the misconception that
Tigriopus californicus are a "cold water" copepod. Cold temperature has nothing to do with the success or failure of our Tigger-Pods (
Tigriopus californicus) in a reef tank. This species is eurythermic, meaning it can tolerate a wide range of temperatures while maintaining reproduction. I grow these animals year round in a greenhouse with temperatures that exceed 80F in the summer months here in the Silicon Valley area of California: we have no climate control. Since they have been in culture for nearly 13 years at our facility, they are fully domesticated to our growing systems and climate changes. Since we have no seasonality issues, we can offer them year-round. They still reproduce just fine and the nauplii (larvae) grow at a normal rate.
The reason they are in the fridge in a store is because they have a high tolerance for cold temperatures. This is something we use to our advantage. We ask that stores keep them refrigerated so that they don't consume all the oxygen in the bottle. The cold slows them down metabolically. They can survive below 40F for weeks, which gives a store time to sell them before the next order.
One of the main reasons they don't persist in marine aquariums with zooplankton predators is that they are very conspicuous (big and red). They get picked off faster than they can reproduce. Hobbyists tend to have more success with this species in a refugium or separate culture. They are very hardy and even beginners can culture them.
The Apex-Pods (
Apocyclops panamensis), on the other hand, are much smaller and don't exhibit the bright red coloration. They are a very good option and have a great chance at populating a reef tank, especially one with a lot of rock and porous substrate. We put roughly 2,000 of these animals in a 6oz. bottle. We also add only individuals above 100 microns so that you get juvenile and newly matured copepods, which means they have their entire reproductive life ahead of them. This species does not tolerate cold temperatures, so we keep it at room temperature and add a little live phytoplankton to each bottle. They are a great copepod that is being used in aquaculture since they don't require live phytoplankton, are very hardy and have a very small newly hatched larvae (nauplius).
If you have any more questions,
@b4tn, don't hesitate to reach out.
Best,
Chad