The recommended stocking density for angelfish is 0.16 to 0.20 fish per liter of water, depending specifically on the size of the fish tank and the species of the fish. For a fish tank with dimensions of 120×40×60 centimeters, the recommended water volume is around 338 liters. So, the stocking density should be controlled between 50 and 80 fish to keep the angelfish in their best condition.
The breeding environment for angelfish requires soft water with a slightly acidic nature. The suitable water temperature is between 26 and 32 degrees Celsius, the pH value should be between 6.5 and 7.0, and the water hardness should be between 3 and 6. During the breeding process, attention should be paid to the management of water temperature, water quality, and diet. Regular water changes are necessary to maintain clean water and an adequate supply of oxygen.
Moreover, different species of angelfish have different requirements for breeding conditions. For example, marine angelfish such as the Queen Angelfish and the King Angelfish need a relatively large aquarium volume. Their maximum body length can reach 25 to 45 centimeters, and they are suitable for being raised in aquariums with a volume of over 300 liters. Therefore, choosing the appropriate species of angelfish and the proper stocking density is crucial for maintaining the health and vitality of the fish.