Black Ruby Barb, also known as Pethia nigrofasciata, is a vibrant and popular freshwater fish species known for its striking appearance and peaceful nature. Here are some details and care requirements for this fish:

1. Temperature: The Black Ruby Barb thrives in tropical water conditions, with temperatures ideally ranging between 72 to 79 degrees Fahrenheit (22 to 26 degrees Celsius). Maintaining stable water temperatures within this range is crucial for the health and well-being of the fish.

2. Minimum Tank Size: To provide a comfortable and suitable environment for a small school of Black Ruby Barbs, a tank of at least 30 gallons (113 liters) is recommended. Providing sufficient space is essential for these active fish to swim and exhibit their natural behaviors comfortably.Black Ruby Barb is known for its stunning ruby-red coloration, with black horizontal stripes that accentuate its appearance. These fish are relatively peaceful and can be kept in community tanks with other non-aggressive fish species that share similar water parameter requirements. Providing a well-planted aquarium with open swimming areas is recommended to mimic their natural habitat.

Feeding the Black Ruby Barb a varied diet consisting of high-quality flake foods, pellets, and occasional live or frozen treats such as bloodworms or brine shrimp is essential to ensure their optimal health and vibrancy. Regular water maintenance and monitoring water parameters are also necessary to create a suitable and stable environment for these fish.