1. Water temperature: For black-backed butterflyfish, maintaining the water temperature between 24-27°C is the most favorable water temperature for their living.

2. Water quality: adjust the salinity content to 1.020-1.025. The black-backed butterflyfish is more suitable for surviving in a weakly alkaline water environment, so the pH of the water body can only be between 8.1-8.4.

3. Feeding: When feeding in captivity, you can give black-backed butterflyfish Butterflyfish are fed an invertebrate diet. It is better to feed nutritious shrimp and bait with coloring function to keep its bright color. If possible, you can also feed some plant-based food.