By Justin Wellman – Director, Tanzanite Pools
More Melbourne homeowners are asking about magnesium and mineral pools as an alternative to traditional chlorine. The appeal is easy to understand: softer-feeling water, a more natural swimming experience, and a system that many families find gentler on skin and eyes. But what exactly is a mineral pool, how does it differ from a salt water or chlorine pool, and is it the right choice for your backyard?
This guide explains how magnesium and mineral pool systems work, the benefits and trade-offs, how they compare to salt water and chlorine, and what to consider before choosing one for your fibreglass pool in Bayside or South East Melbourne.
For families in suburbs such as Brighton, Hampton, Sandringham, Beaumaris, Black Rock, Mentone, Cheltenham and Mordialloc, water type is becoming just as important a decision as pool shape and design.
What Is a Magnesium or Mineral Pool?
A mineral pool uses dissolved minerals — most commonly magnesium chloride and potassium chloride — instead of relying solely on traditional chlorine to keep the water clean and comfortable. The result is water that many swimmers describe as softer and more pleasant on the skin.
The term “magnesium pool” usually refers to a mineral system where magnesium is the key ingredient. It is worth clearing up a common misconception: most mineral pools are not completely chlorine-free. They typically still produce a small amount of sanitiser to keep the water safe and hygienic, but they use a blend of minerals to reduce reliance on conventional pool chemicals and improve the feel of the water.
How a Mineral Pool System Works
A mineral pool works in a similar way to a salt water pool. Minerals are added to the water, and the system passes the water through a chlorinator or mineral cell. This converts a portion of the minerals into a natural sanitiser that keeps the pool clean, while the remaining minerals give the water its characteristic soft feel.
In practice, this means you handle and store fewer harsh chemicals than with a manually chlorinated pool, and the day-to-day swimming experience is often more comfortable. The system still needs to be monitored and balanced, but many owners find the routine straightforward once it is set up correctly.
The Benefits of a Magnesium Pool
Magnesium and mineral pools have become popular for several practical reasons, particularly for families and anyone with sensitive skin.
1. Softer, more comfortable water
The most commonly cited benefit is the feel of the water. Magnesium-based pools tend to produce noticeably softer water, which many swimmers find gentler on the skin and eyes compared with a heavily chlorinated pool.
2. Gentler for sensitive skin
Because mineral systems reduce reliance on harsh chemicals, families often choose them for children or for anyone prone to skin or eye irritation in conventional pools. While individual experiences vary, this is one of the most popular reasons people make the switch.
3. Fewer harsh chemicals to handle
Mineral pools typically require you to store and add fewer aggressive chemicals than a traditional chlorine pool. For many homeowners, that means a simpler, lower-fuss maintenance routine and fewer chemical odours around the pool.
4. A more natural swimming experience
The combination of soft water and reduced chemical smell gives mineral pools a more natural, spa-like feel. For homeowners building a backyard designed for relaxation and family time, this can be a meaningful part of the experience.
Magnesium vs Salt Water vs Chlorine Pools
Choosing a water type is about balancing comfort, cost and maintenance. The table below compares the three most common approaches for Melbourne pools.
| Feature | Magnesium / mineral pool | Salt water pool | Traditional chlorine pool |
|---|---|---|---|
| Water feel | Soft and gentle | Smooth, slightly salty | Can feel harsher |
| Sanitiser | Mineral blend with reduced chlorine | Chlorine generated from salt | Added chlorine |
| Chemical handling | Reduced | Reduced | Most hands-on |
| Upfront cost | Higher (mineral system and minerals) | Moderate | Lowest |
| Best for | Soft water, sensitive skin, natural feel | Low-fuss everyday swimming | Lowest upfront budget |
There is no single right answer — the best choice depends on your priorities around comfort, budget and how hands-on you want to be with maintenance.
What Does a Mineral Pool Cost to Run?
Mineral pools generally have a higher upfront cost than a basic chlorine setup, because of the mineral system and the cost of the minerals themselves. Ongoing costs depend on your pool size, how often the pool is used, evaporation and top-ups, and how the system is balanced and maintained.
Many owners feel the added comfort and reduced chemical handling justify the difference, but it is worth budgeting for both the setup and the ongoing minerals. The most accurate figure for your pool comes from a proper assessment — request a consultation to talk through the options for your backyard.
Are Mineral Pools a Good Fit for Fibreglass Pools?
Mineral and magnesium systems pair well with fibreglass pools. The smooth, non-porous fibreglass surface is easy to keep clean and works neatly alongside the soft-water experience that mineral systems are known for. If a comfortable, low-fuss, family-friendly pool is your goal, a fibreglass shell with a mineral system is a popular combination.
You can explore the designs available in our fibreglass pool range, and if you are still comparing pool types, our guide to fibreglass vs concrete pools covers the key differences. For ongoing care, see our advice on fibreglass pool maintenance.
Things to Consider Before Choosing a Mineral Pool
Before deciding, it helps to weigh a few practical points. Mineral pools usually cost more to set up and the minerals add an ongoing expense. The water still needs regular monitoring and balancing — soft water does not mean maintenance-free. Most systems are not entirely chlorine-free, so if that is your expectation, it is important to understand how the system actually sanitises the water. And as with any pool, water comfort is only one part of the picture: pool safety, supervision and compliance remain essential regardless of the water type you choose.
Pool Safety Still Comes First
Whatever water type you choose, pool safety in Victoria is non-negotiable. Swimming pools and spas capable of containing 300mm or more of water must have a compliant safety barrier, and owners are responsible for keeping that barrier maintained and in working order. A more comfortable swimming experience should always sit alongside active adult supervision, compliant pool fencing, self-closing and self-latching gates, and clear visibility from the home. You can read more in our Bayside pool builders guide.
Local Example: A Family-Friendly Mineral Pool in Brighton
A Brighton family building a new fibreglass pool for young children might choose a magnesium mineral system specifically for the softer water and reduced chemical handling. Paired with a smooth fibreglass shell, this kind of setup can deliver a gentle, comfortable swimming experience that suits sensitive young skin — while still meeting all the usual safety and compliance requirements for a Bayside backyard.
Start Designing Your Ideal Pool
Choosing your water type is part of designing a pool that genuinely fits how your family wants to swim. Magnesium and mineral pools offer a softer, more natural experience that many Melbourne homeowners love, and they pair beautifully with a quality fibreglass shell.
At Tanzanite Pools, we design and install fibreglass pools across Bayside and South East Melbourne, and we help you choose and set up the right water system — mineral, magnesium or salt — as part of your build. We walk you through how it all works at handover and recommend a trusted pool service company for ongoing water care, so you can simply enjoy the pool.
Ready to explore your options?
Browse our fibreglass pool range or request a consultation to discuss whether a magnesium or mineral pool is right for your home.
Tanzanite Pools: crafting premium fibreglass pools for Melbourne families who value comfort, style and quality.
FAQs About Magnesium and Mineral Pools
What is a magnesium pool?
A magnesium pool is a type of mineral pool that uses dissolved magnesium (usually magnesium chloride), often blended with potassium chloride, to create softer water and reduce reliance on traditional chlorine. Most magnesium pools still produce a small amount of sanitiser to keep the water safe.
Are magnesium pools chlorine-free?
Generally no. Most mineral and magnesium pools are not completely chlorine-free — they typically still generate a small amount of sanitiser to keep the water hygienic, but they rely on a mineral blend to reduce harsh chemicals and improve the feel of the water.
What are the main benefits of a magnesium pool?
The most popular benefits are softer, more comfortable water that many find gentler on skin and eyes, reduced handling of harsh chemicals, and a more natural swimming experience with less chemical odour.
Is a mineral pool more expensive than a chlorine pool?
Usually yes. Mineral pools tend to cost more upfront because of the mineral system and the minerals themselves, and the minerals are an ongoing cost. Many owners feel the added comfort and reduced chemical handling are worth the difference.
Can I have a magnesium pool with a fibreglass shell?
Yes. Mineral and magnesium systems pair well with fibreglass pools. The smooth, non-porous surface is easy to keep clean and complements the soft-water experience these systems are known for.
Do mineral pools still need maintenance?
Yes. Soft water does not mean maintenance-free. Mineral pools still need regular monitoring and water balancing, though many owners find the routine simpler because there are fewer harsh chemicals to handle. We set up the system as part of your build, show you the basics at handover, and recommend a trusted pool service company for ongoing water care.
A Note from Justin Wellman – Director, Tanzanite Pools
“We build lifestyles that people love and homes that people love coming home to.”
With over a decade in the pool industry, I’ve learned that every family is unique and every property has its own character. My philosophy is simple: your pool should reflect both. When we plan your pool, we aren’t just digging a hole; we are designing the space where your family’s best memories will be made. Our approach is collaborative, honest, and anchored in strong community values. We treat your backyard as if it were our own.
Disclaimer: This article provides general information regarding pool installation and design. Costs, timelines, and permit requirements vary based on individual site conditions and local council regulations. Always consult with a licensed professional builder before commencing works. For more information on Victorian water safety, visit the Victorian Building Authority (VBA).
