The requirements of angelfish for water quality include suitable pH value, water temperature, and water hardness. Angelfish prefer slightly acidic water. The pH value should be maintained between 6.5 and 7.5. The water temperature should be kept between 24 28°C. Higher temperatures help enhance the fish's activity level and health. Angelfish prefer soft water, which means the water contains a relatively low amount of soluble calcium and magnesium compounds.
The specific methods for adjusting the water quality for angelfish are as follows:
Adjusting the pH Value:
Measurement: Use an electronic pH meter, pH test strips, or pH test reagents to accurately measure the pH value of the water in the fish tank.
Adjustment: If the pH value is too high, you can use oxalic acid or sodium dihydrogen phosphate solution to adjust it. If the pH value is too low, you can add baking soda solution or a specialized water quality regulator.
Regulating the Water Temperature:
Use a heating rod to maintain the water temperature at around 28°C. Make sure the water temperature is stable and evenly distributed. Regularly check the working condition of the heating rod to avoid significant fluctuations in water temperature.
Softening the Water Quality:
Boiling Tap Water: Since household tap water is usually hard water, you can reduce its hardness by boiling. After boiling, the water should be cooled to an appropriate temperature before use.
Using a Water Softener: There are special water softeners available on the market for softening water quality. You can add an appropriate amount to the fish tank according to the instructions.
Filter Assistance: Filters containing zeolite or activated carbon can effectively remove some of the minerals and impurities in the water, thereby reducing the water hardness.
Daily Water Conditioning and Water Change Management:
Water Conditioning: Newly added water must be fully aerated to remove chlorine and other harmful substances. The aeration time should be at least 16 hours. You can also choose to add a water quality stabilizer to help maintain the stability of the water quality.
Water Changes: It is recommended to change the water for angelfish regularly. Usually, change the water once a week, and the amount of water changed should be controlled within one quarter of the total water volume of the fish tank. Before changing the water, you need to wipe the fish tank walls and clean the filtration equipment first.