Why Go Chemical-Free When Cleaning Your Pool?

Keeping your pool clean and free from algae is important for both aesthetics and health. However, many pool owners in New Zealand, like myself, are looking for ways to remove algae without relying on harsh chemicals such as chlorine or algaecides. Whether it’s to avoid irritation, reduce environmental impact, or simply use a more natural approach, there are several effective ways to keep your pool clear without chemicals.

Natural Methods to Remove Algae from Your Pool

1. Brushing and Manual Cleaning

One of the simplest and most effective ways to remove algae is physical scrubbing. I use a pool brush with stiff bristles to scrub the walls, steps, and floor of my pool, ensuring I loosen any algae growth. A pool vacuum, like those sold at Para Rubber NZ, can help remove debris from the water after brushing.

2. Increase Filtration and Circulation

Algae thrive in stagnant water. Running your pool pump and filter for longer periods can significantly reduce algae growth. If your system allows for it, adjust the pump to run for at least 8-12 hours a day. Cleaning the filter regularly, whether it’s a sand, cartridge, or DE filter, will also improve water circulation and clarity.

3. Use a Pool Skimmer Frequently

Removing organic material (leaves, dirt, and debris) before it breaks down can help prevent algae from forming. I make it a habit to skim the pool daily, especially after heavy rain or strong winds, which are common in New Zealand. Investing in a good quality skimmer from stores like Pool & Spa Warehouse can make the job easier.

4. Balance Your Pool’s pH Naturally

Maintaining the right water balance is key to preventing algae. Ideally, your pool’s pH should be between 7.2 and 7.6. Instead of using chemicals, you can try baking soda to raise pH or vinegar to lower it. Testing kits from Kiwi retailers such as Mitre 10 can help you monitor levels and keep water balanced.

5. Use a Pool Cover to Limit Sunlight

Algae love sunlight, so limiting their exposure can reduce growth. A good quality solar pool cover from Bunnings NZ can help keep sunlight out while also maintaining water temperature and reducing evaporation.

6. Shock Your Pool with Natural Solutions

Instead of using chemical shock treatments, some pool owners swear by adding hydrogen peroxide (food-grade, 35%) as an oxidiser. It works similarly to chlorine but is less harsh. However, ensure that your pool is not heavily chlorinated before using this method.

Another natural approach is using barley straw, which, when decomposing in water, releases peroxides that naturally prevent algae. You can find barley straw from some farm suppliers or garden centres across New Zealand, such as Kings Plant Barn.

7. Introduce Beneficial Microorganisms

Some pool owners have had success using good bacteria and enzymes that consume organic contaminants, starving algae of nutrients. Look for natural enzyme pool treatments, which are available from specialist pool shops or eco retailers like The Green Collective.

Preventative Measures to Keep Algae Away

Once you’ve removed algae from your pool, preventing future outbreaks is key. Here are some simple habits I’ve incorporated:

✅ Regular maintenance – Brush, skim, and vacuum weekly.
✅ Proper water circulation – Run the pump and clean filters frequently.
✅ Monitor pool chemistry – Test water pH and alkalinity levels weekly.
✅ Limit organic debris – Keep surrounding trees trimmed to reduce leaf accumulation.
✅ Cover the pool – Use a pool cover when it’s not in use.

Final Thoughts

Removing algae from a pool without chemicals is definitely possible with a consistent and proactive approach. While it may require a little more time and effort, the benefits of a natural, chemical-free pool make it worthwhile. Whether you’re using increased filtration, a bit of elbow grease, or natural oxidisers, these methods are effective and better for the environment.

Have you tried any of these methods? Let me know your experiences—I’d love to hear how other New Zealand pool owners are keeping their pools algae-free the natural way!