Ruby red Cardinals, Apogon coccineus, make a great addition to your smaller reef or nano tank. A single specimen can be kept in as little as a 10 gallon tank. 29 gallons is suitable for 3.
Ruby red Cardinals, Apogon coccineus, stay small, so can be kept in a school even in smaller reef tanks. Feed a variety of finely chopped items and keep away from aggressive tankmates.
