It’s a fair question and one we get asked most weeks:
“Can I start with a saltwater pool now, and upgrade to a mineral pool later when the kids are older and we can afford it?”
The short answer: yes, easily. The longer answer involves a few numbers and one important caveat.
What actually changes between the two systems
A saltwater pool has:
- Pool salt in the water (typically 3,500–4,500ppm)
- A salt chlorinator that converts the salt to chlorine on demand
- The salt cell itself as the main hardware
A mineral pool has:
- A blend of magnesium chloride, potassium chloride, and pool salt in the water
- A mineral-capable chlorinator (sometimes the same hardware, sometimes upgraded)
- Ongoing top-ups of mineral salts as the water is diluted (rain, splashout, backwash)
The pool shell, the plumbing, the pump, and the filter don’t change at all. The upgrade is chemistry and (sometimes) chlorinator hardware.
What the upgrade actually costs
Three possible scenarios depending on what chlorinator you started with:
Scenario 1 — Your original chlorinator is already mineral-capable. Most modern chlorinators (e.g. Zodiac AquaPure, AstralPool Viron eQuilibrium, Davey Grando) handle mineral water just fine. In this case the upgrade is just a mineral top-up dose: $600–$1,000 in minerals to raise the levels, then ongoing top-ups.
Scenario 2 — Your original chlorinator is basic and needs upgrading. On some budget saltwater setups the chlorinator isn’t sized right for mineral loads. Upgrade to a mineral-capable unit: $1,500–$2,500 in hardware plus the initial mineral dose. Total upgrade cost around $2,500–$3,500.
Scenario 3 — You want to drain and refresh the pool. Some owners upgrade at the same time they’re doing a general refresh (10 years in, they drain the pool for a wall clean anyway). In that case the mineral dose is fresh water plus new minerals: $800–$1,200 depending on pool size. This is actually the cheapest upgrade path if you were going to drain anyway.
The ongoing cost difference
After the upgrade, the main change is the annual cost of mineral top-ups vs salt top-ups.
A typical Mackay family pool uses:
- Saltwater: around $150–$250 a year in pool salt.
- Mineral: around $500–$800 a year in mineral salt blends.
So the ongoing cost difference is roughly $300–$600 a year. Whether that’s worth it comes down to how much you value the different water feel.
The one caveat — plan the timing
Mineral systems work best in relatively fresh water. If your pool has been running on straight saltwater for years with lots of chlorine chemistry residue, you’ll get the best mineral experience if you do a partial drain (30–50% of the water) at the same time as the upgrade. This gives the minerals a clean canvas to work with.
So realistically the best time to upgrade is either:
- Within the first 2 years of pool ownership, when the water is still fresh.
- Alongside a scheduled water refresh at year 8–10.
Upgrading at year 5, mid-cycle, works but doesn’t feel as good.
What we spec on new Mackay builds
On our new Compass installs in the Mackay region, we spec a mineral-capable chlorinator on every build. Even if the family starts on saltwater, they’re not locked in. The hardware is ready to go if they upgrade in year 3 or year 5.
Adds around $200–$400 to the initial build cost. Preserves optionality forever. Worth it for the flexibility.
Should you just start on mineral?
If the budget allows and you’re the kind of family who wants the water feel from day one — yes, start on mineral. The initial build cost difference between a saltwater setup and a mineral setup is only $1,500–$2,500 at the point of install. That’s a lot less than paying twice.
But if the pool budget is tight and you want to start with salt and see whether mineral is a priority for you later, that’s a valid path too. Just make sure your chlorinator is mineral-capable.
Book a site visit and we’ll walk through the sanitiser options for your specific family and the upgrade path if you want to preserve it.
