Why are my shrimp not breeding?

GH 5 KH 2 PH 7.6

Jar has been up for 3 months, fully cycled. Full of copepods, detritus worms, hair algae that imply a healthy tank. But shrimp are still not breeding! Any suggestions?

GH 5 KH 2 PH 7.6

Jar has been up for 3 months, fully cycled. Full of copepods, detritus worms, hair algae that imply a healthy tank. But shrimp are still not breeding! Any suggestions?