In the early 2010s, a full-scale replica of the upper of Devils Hole was built at the new Ash Meadows Fish Conservation Facility (AMFCF), resulting in a tank. This refuge nearly mimics the natural Devils Hole, including water chemistry, spawning shelf, and natural sunlight. It intentionally differs, however, in temperature and dissolved oxygen content. The temperature is cooler than that of Devils Hole and the dissolved oxygen content is doubled in attempts to reduce thermal and respiratory stress on the fish. At least fifty captive fish populated the refuge as of 2019, with an additional 10–20 in propagation tanks. Eggs laid in the refuge tank are raised to adulthood in a separate tank. While efforts have been made to remove the predaceous beetle "Neoclypeodytes cinctellus" from the captive population's tank to lessen its depredation on eggs, it has not been removed from Devils Hole. It is unknown how removal of the species could affect the Devils Hole ecosystem, and the number of beetles in Devils Hole is less than in the tank hosting the captive population.