Can I Start with a Saltwater Pool and Upgrade to Minerals Later?
Yes—in most cases, you can.
This is one of the questions we get asked most often, and it’s good news for homeowners who want to keep their initial pool investment lower while leaving the door open to upgrade later.
Most modern saltwater chlorinators are compatible with mineral salt blends, meaning you can start with a traditional saltwater pool and, when you’re ready, switch to a magnesium-based mineral blend without replacing your chlorinator.
How Does It Work?
A standard saltwater chlorinator creates chlorine by passing an electrical current through dissolved salt in the pool water. Mineral pool systems work in exactly the same way—the difference is simply the type of salts dissolved in the water.
Instead of using only sodium chloride (pool salt), mineral systems use a carefully balanced blend of minerals such as magnesium and potassium. Your chlorinator continues to generate chlorine to sanitise the pool, while the minerals provide a softer, more luxurious swimming experience.
Many pool owners notice benefits such as:
- Softer-feeling water that’s gentler on skin and eyes.
- The relaxing properties often associated with magnesium.
- Reduced calcium scale build-up on the chlorinator cell, which may help extend its service life.
- A less noticeable chlorine smell due to lower chloramine levels.
Is My Chlorinator Compatible?
Most modern chlorinators are suitable for mineral blends, although it’s always worth checking with the manufacturer before making the switch.
At Compass Pool Centre Newcastle, we’ve already done that homework for our customers.
If you’re purchasing a new pool from us, simply let your Pool Planner know that you’d like the option to upgrade to minerals in the future, and we’ll ensure you’re set up correctly from the beginning.
If you already own a Compass Pool and are considering making the change, give our team a call. We’ll check your existing equipment and recommend the best mineral blend for your system.
Making the Switch
Changing from saltwater to a mineral blend is usually straightforward.
Once compatibility has been confirmed, simply replace or top up your existing pool salt with the recommended mineral blend according to the manufacturer’s instructions. After adding the minerals, allow the filtration system to circulate the water for several hours before testing and rebalancing your pool chemistry, as minerals can slightly affect pH and total alkalinity.
Our Advice
One of the great things about choosing a saltwater pool is that it doesn’t lock you into one option forever.
Many of our customers start with a traditional saltwater system because it’s the most economical choice, then upgrade to minerals later once they’ve experienced pool ownership and decide they’d like the added comfort. It’s a flexible approach that allows you to spread the investment over time while still enjoying all the benefits of a beautifully sanitised pool.
Frequently asked questions
Do I need to drain the pool to upgrade from salt to mineral?
In most cases no. The salt water can stay — you top up with mineral salts to raise the magnesium and potassium content to the right ratio. A small partial water change (10–20%) is sometimes done to reset the balance, but full drainage is rarely needed.
How much does it cost to upgrade a saltwater pool to mineral in Newcastle?
The mineral upgrade itself is usually $600–$1,500 depending on pool size and how much mineral top-up is needed. If your existing salt chlorinator is old or undersized we may recommend upgrading that at the same time, which brings the total to $1,800–$3,500. We provide a fixed quote after a site visit anywhere in Newcastle, Lake Macquarie or the Hunter Valley.
Do I keep my existing salt chlorinator?
Usually yes. Modern salt chlorinators run mineral pools without any hardware change — the electrolysis process is the same. Older or entry-level chlorinators can struggle with the slightly different salinity and might benefit from being replaced with a mineral-rated unit.
How long does the upgrade take and how much pool downtime?
Typically half a day of installation, then 3–7 days of running the filter while the minerals distribute and balance. You can usually swim within 24 hours of installation.
Does upgrading to mineral affect the pool warranty?
No. For Compass pools, both salt and mineral use are covered by the standard warranty. The Bi-Luminite and Vivid gel-coat finishes handle mineral water without any issue.
What can I do with the drained pool water if a partial change is needed?
Pool water should never go into the stormwater system — stormwater drains run straight to creeks, the Hunter River and the beaches. Check with Hunter Water and your council for the approved disposal method at your property, and never fully drain a fibreglass pool without professional advice. Rural clients in Cessnock, Muswellbrook and Singleton usually put pool water on the garden or paddock — check with your local Council if unsure.
Can I switch back to a straight saltwater pool later?
Yes, easily. Because the mineral system is chemistry-based rather than a hardware change, you simply stop topping up with mineral salts. Over 6–12 months the mineral content dilutes with normal top-ups and evaporation, and you’re back to standard saltwater. No plumbing changes required.
We're planning to renovate the pool area next year — should we upgrade now or wait?
If you’re renovating coping, paving or surrounds, we’d recommend upgrading to mineral first — that way any equipment changes happen while the pool is already offline. Book a site visit and we’ll walk through the sequencing so you don’t pay twice for the same work.