Keeping your pool water balanced without relying on a tonne of chemicals isn’t just possible—it’s actually better for your health, your pool, and the environment. If you’re tired of chucking in chlorine and hoping for the best, here’s how you can keep your pool clean the natural way.

Know What You’re Dealing With

Pool chemistry doesn’t have to be overly complicated. There are a few key things that matter:

• pH levels (how acidic or alkaline the water is)
• Alkalinity (which helps stabilise the pH)
• Sanitisation (keeping bacteria and algae in check)

Get yourself a good test kit from somewhere like Bunnings NZ or Mitre 10. Testing once or twice a week gives you a better chance of fixing any problems before they become a green, slimy disaster.

Keep pH Levels In Check Naturally

Your pool’s pH should sit between 7.2 and 7.6. If it’s too high, you’re in for cloudy water and scaling on pool surfaces. Too low? That can corrode metal parts and irritate your skin.

Instead of using chemical pH adjusters, try these natural fixes:

• Baking Soda – If your alkalinity is low, adding baking soda (sodium bicarbonate) can help stabilise it. A general rule of thumb is about 600g per 40,000 litres to slightly raise alkalinity. You can pick some up at The Warehouse or your local supermarket.
• White Vinegar or Ascorbic Acid – These can help lower pH if it’s climbing too high. Use sparingly and test the water after adding.

Let Mother Nature Do Some of the Work

If you’re trying to cut down on chlorine, you’ve got options.

• Salt Water Systems – These generate natural chlorine but in lower doses, making the water softer and less irritating. Check pool supply shops like Para Rubber for salt chlorinators.
• Mineral-Based Sanitisers – Some systems use magnesium or copper to keep algae and bacteria away. They’re available through places like The Pool Warehouse NZ.

Circulation is Everything

Here’s the thing—if your water isn’t moving, it’s a breeding ground for bacteria. Run your pump for at least 6–8 hours a day during summer and a bit less in winter. A solar-powered pool skimmer from Trade Tested can help keep things moving without adding to the power bill.

Use Plants & UV Filters

Ever noticed how natural ponds stay clear? That’s because plants and UV exposure help keep unwanted bacteria at bay.

• Consider a UV sanitiser, which kills bacteria using ultraviolet light instead of chlorine. Check out Pioneer Pools for options.
• Plant some pool-friendly greenery around your pool to absorb excess nutrients that algae love. Try papyrus or lily turf—available at Kings Plant Barn.

Rainwater & Pool Covers

Rain might feel like free top-up water, but it can mess with your chemical balance. A pool cover (like the ones from Pool & Spa Warehouse) helps keep debris out and reduces chemical loss.

Final Thoughts

Balancing your pool naturally isn’t about ditching all pool care—it’s about replacing harsh chemicals with smarter, gentler alternatives. Keep testing, keep the water moving, and let nature lend a hand. It’s easier than you think.