Can I Water Plants with Old Pool Water?

If you have an outdoor pool, you've likely encountered the issue of what to do with the water once the swim season ends. Drainage systems can be expensive, and refilling the pool every year can waste resources. It's natural to wonder whether you can use old pool water to nourish your plants instead.

The Short Answer

Yes, but with some precautions. A simple answer would be to say that it's perfectly safe to use old pool water as a plant tonic, but the truth is a bit more complicated than that. It depends on how well you've taken care of the pool water in the first place and how you plan to use the old water.

The Long Answer

Pool water is full of chemicals and minerals that your plants may find beneficial, but it can also contain harmful pollutants, such as chlorine, salt, and chemicals from sunscreens and pool cleaners. Chlorine, in particular, is toxic to plants and can damage or kill them. Plants that are sensitive to salt may also suffer when watered with pool water.

The safest ways to use old pool water on plants include using water that has been dechlorinated, removed of chemicals, and diluted, to reduce the concentration of salts or minerals. You can achieve this by letting the water sit in a container for two or three days, or by using a water conditioner that neutralizes chlorine and heavy metals. A simple ratio of roughly one part pool water to four parts tap water can also work.

When watering with pool water, keep in mind that different plants have different requirements when it comes to water quality and minerals. Acid-loving plants, for example, usually prefer water that has a lower pH level, while plants that prefer alkaline soil will benefit from water that is slightly more alkaline. Testing the pH level of your pool water and adjusting it accordingly can help avoid damage to your plants.

Conclusion

In conclusion, it is possible to use old pool water on your plants, but it's important to take precautions first. When in doubt, it's always better to err on the side of caution and check with a specialist or do some research before using old pool water on any plant. Keep in mind that not all plants will react the same to pool water, so it's important to observe your plants closely to ensure they are not being damaged by the water.

With proper dilution, treatment, and care, however, you can turn old pool water into a valuable resource that your plants will thank you for.