why is my pool filter orange


Why Is My Pool Filter Orange?

If you're a pool owner who has noticed that your pool filter has turned an unsightly shade of orange, don't panic! While it's certainly not a desirable outcome, the good news is that it's a common problem with a relatively simple solution.

In this article, we'll explore the reasons why your pool filter may have turned orange, and what you can do to fix it.

What Causes a Pool Filter to Turn Orange?

There are a few different reasons why your pool filter may have taken on an orange hue. Some of the most common factors include:

- Iron or Copper Build-Up: If the water in your area has high levels of iron or copper, it can cause these minerals to build up on your pool filter. Over time, this can result in an orange or brown color.

- Algae Growth: If your pool has been plagued by algae, it's possible that the algae growth has stained your filter with an orange tint.

- Rust: If your filter contains metal components (such as screws, bolts, or clamps), it's possible that rust has corroded these parts and resulted in an orange color.

- High pH Levels: A high pH level in your pool water can cause minerals to precipitate out of the water and onto your pool filter. This can result in an orange or yellow color.

How Can I Fix My Orange Pool Filter?

If you've determined that the cause of your orange pool filter is due to high levels of iron or copper in your water, the first step is to test your water to confirm those levels. If they are indeed high, you may want to invest in a water treatment system that can remove those minerals from your water before it reaches your pool.

Alternatively, you can try adding a metal sequestering agent to your pool water. These agents bind to metal ions and prevent them from building up on your pool filter.

If the cause of your orange pool filter is due to algae growth or high pH levels, the solution is relatively simple: shock your pool with a high dosage of chlorine or another oxidizing agent. This will kill any algae present in your pool water and help balance out the pH level.

If your filter has been stained due to rust or corroded metal components, you may need to replace those parts or consider upgrading to a newer filter. In the meantime, you can try scrubbing the affected areas with a wire brush to remove any visible rust or debris.

How Can I Prevent My Pool Filter from Turning Orange in the Future?

The best way to prevent your pool filter from turning orange is to keep up with regular maintenance and cleaning. This means:

- Regularly cleaning your filter according to the manufacturer's instructions

- Balancing your pool water chemistry to prevent mineral build-up

- Keeping your pool free of debris and algae

- Regularly inspecting your filter for signs of wear or damage

If you live in an area with high levels of minerals in the water, you may want to consider investing in a water treatment system or using a metal sequestering agent to prevent mineral build-up.


While an orange pool filter may not be the most attractive sight, it's a problem that can be easily resolved with a bit of effort and know-how. By understanding the causes of an orange pool filter and taking steps to prevent it, you can keep your pool filter (and your pool!) looking clean and clear all season long.


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