Here’s a detailed guide on treating tap water for betta fish keeping, including specific steps and methods:
I. Chlorine Removal
Air-Drying Method
Pour tap water into an open container (such as a bucket or basin) and let it sit for 1 to 3 days to allow chlorine to evaporate naturally.
In summer or in well-ventilated areas, this time can be shortened to 24 hours.
Aeration Method
Use an air pump to aerate the water, which accelerates chlorine dissipation. This process can be completed in under 24 hours.
Chemical Treatment
Add a water conditioner (like a dechlorinator), or mix 5–10 drops of vitamin C solution per liter of water to neutralize chlorine.
II. Water Temperature Adjustment
After treatment, adjust the water temperature to 24–28°C (the ideal range for bettas). Ensure the temperature difference between the treated water and the aquarium water does not exceed 2°C.
You can use a heater or let the water reach room temperature naturally to balance it.
III. Water Quality Optimization
pH Level Adjustment
Bettas thrive in water with a pH of 6.5–7.2. To lower the pH to a slightly acidic range, use almond leaves or concentrated almond leaf extract.
Dissolved Oxygen
Maintain dissolved oxygen levels at ≥5mg/L. This can be achieved with aeration equipment or by replacing 1/3 of the water weekly.
IV. Additional Notes
Using Salt: When introducing new fish to the tank, add 5 grams of aquarium salt per liter of water. This helps regulate osmotic pressure and inhibits bacteria.
Water Change Frequency: For small tanks (<20cm), replace all the water weekly. For larger tanks, replace 25%–50% of the water monthly.