How do you remove the yellow colour of fish tank water?

Here are some steps you can try to remove the yellow colour of fish tank water:

Step 1: Water Change: Perform a partial water change (around 25%-50%) with clean, treated water.

Step 2: Activated Carbon: Use activated carbon filter media in your filtration system. Activated carbon helps remove impurities and discoloration from the water.

Step 3: Reduce Sunlight Exposure: Keep the fish tank away from direct sunlight, as excessive lighting can promote algae growth, leading to yellow water.

Step 4: Overfeeding Reduction: Avoid overfeeding the fish, as excess food can decompose and contribute to water yellowing.

Step 5: Clean the Substrate: Rinse the fish tank substrate using tank water during water changes to remove any dirt or waste particles.

Step 6: UV Sterilizer: Consider using a UV sterilizer, a device that utilizes ultraviolet light to kill microorganisms that may be causing water discolouration.

Step 7: Use Water Clarifiers: Certain water clarifiers or flocculants can aid in clumping suspended particles, making them easier to remove through filtration.

Step 8: Plants or Algae Scrubbers: Introduce live plants or utilize an algae scrubber to help consume nutrients and impurities in the water.

Step 9: Regular maintenance: Maintain consistent water parameters, including pH, hardness, and nitrogen levels, to keep the ecosystem balanced and minimize the risk of yellow water.

Step 10: Patience: Some conditions might take a few days or weeks to resolve; allow time for biological processes to occur.

Note: Some yellowing of water might be caused by natural substances, such as tannins released from driftwood or leaves, unless they cause harmful effects, these may not necessitate active removal attempts.