Half gallon jar with 6 brackish Opae Ula shrimp. No heater, filter, or water changes required. Keep out of direct sunlight and windows. Top off with distilled water only. Feed one pellet per 3 shrimp once a month. Opae Ula are unlike any other species in the hobby. They prefer still, stagnant, brackish water- water changes pose a huge risk to the free floating larval babies. Most of their diet comes from the algae that grows naturally under room light. Food pellets act as a sort of vitamin to maintain proper nutrition. The sand and stone provide calcium for molting. Includes food and several care cards.