Why is the water yellow in above ground pool?

If you fill your pool with water from a well, city water source, or nearby pond, it could contain high levels of iron or copper. When these metals come into contact with the chlorine in your pool water, they can cause it to turn yellow or brown.

A dirty filter

A dirty filter can trap dirt, debris, and minerals, which can then dissolve into the water and cause it to turn yellow. Make sure to clean your pool filter regularly to prevent this from happening.

Old pool liner

If you have an old pool liner, it may start to break down and release chemicals into the water, which can cause it to turn yellow. If your pool liner is more than 10 years old, it's time to replace it.

Chemical imbalance

A chemical imbalance in your pool water can also cause it to turn yellow. For example, if the chlorine level is too low, it won't be able to properly oxidize the dirt and debris in the water, which can cause it to turn yellow.

Organic matter

Organic matter, such as leaves, grass clippings, and pollen, can also cause pool water to turn yellow. Make sure to keep your pool clean and free of debris to prevent this from happening.