I've never had these myself, but POISON FROGS Professional Breeders Series, suggests a spawning hut that just fits the frogs. They lay from 30 or more eggs, which can be raised together as the tads aren't cannibalistic. Larval development takes about 90 days. This source does not mention either male guarding or transport to a water body in E. trivittatus, as it does with some of the other Epipediobates species, so I assume you would need to remove the eggs to a small shallow aquarium, keep just moist until the tads hatch, then gradually add more water, etc. Hopefully, there will be someone else here who has some actual experience hatching them.
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Patty
Pahsimeroi, Idaho
4 D. auratus blue
6 D. galactonotus pumpkin orange splash back
7 D. imitator
6 D. leucomelas
6 D. pumilio Bastimentos
4 D. fantasticus
6 P. terribilis mint and organe
4 D. reticulatus
4 D. castaneoticus
2 D. azureus
4 P vittatus
2 P. lugubris