Run a greener pool, without compromise.
Eco-friendly pool ownership is not about cutting corners. It is about running your pool on less water, less energy, and fewer chemicals — while protecting the asset itself. Every efficiency decision John Brennan Pools recommends is grounded in over 25 years of hands-on technical experience.
Where sustainability actually lives.
A genuinely eco-friendly pool comes down to three controllable areas. Get these right and the savings — and the environmental benefit — follow.
Water Conservation
Pools lose most of their water to evaporation, not splashing or backwashing. A pool cover addresses the single largest loss directly — and stops thousands of litres disappearing into the Central Coast sky each summer.
Energy Efficiency
The pump and the heater account for the overwhelming majority of a pool's running cost. Variable-speed pumps and efficient inverter heat pumps cut that draw substantially without compromising water quality.
Clinical Water Chemistry
Precise water balance means less product, gentler water, and less chemical runoff. Clinical chemistry is efficient chemistry — the practice tests so the pool needs the minimum effective dose, never more.
A sustainable pool isn't a different kind of pool. It's simply a well-run one. — John Brennan, Practice Lead
Most pool water is lost to the sky.
The largest water loss from a Central Coast pool is not swimming or backwashing — it is evaporation. On a hot, windy day an uncovered pool can lose several millimetres of water overnight. A well-fitted pool cover is the single most effective response, with smart water conservation measures reducing evaporation by up to 90%.
A pool losing more water than the local evaporation rate usually has a leak. Caught early, the repair is minor; left unchecked, it wastes thousands of litres and drives up chemical and heating costs.
John Brennan Pools assesses these losses as part of considered maintenance, and fits the right pool cover for the pool — solar, thermal, or safety — rather than a one-size-fits-all product.
Where the running costs really hide.
Two systems dominate a pool's energy bill: the pump and the heater. An old single-speed pump running at full power for hours is the most common source of waste — an energy-efficient variable-speed pump adjusts its output to demand and runs only as hard as needed.
A heat pump's efficiency is measured by its Coefficient of Performance. A higher COP means more heat delivered per unit of electricity — which is why a quality inverter unit outperforms a cheap import over its life.
The practice pairs an efficient inverter heat pump with the right run-time settings, and can explain exactly what COP means for your power bill.
Six steps to a greener pool.
In order of impact. Most pools benefit most from the first three — and none of these compromise water quality or swimming comfort.
Fit a Pool Cover
The highest-impact single change. A cover cuts evaporation, heat loss, and debris in one step — reducing water, energy, and chemical use simultaneously.
Upgrade the Pump
Replace an ageing single-speed pump with a variable-speed unit. It is typically the largest energy draw on the property and the fastest efficiency win.
Heat Efficiently
Swap gas or cheap-import heating for a quality inverter heat pump with a high COP. It extends the swimming season for a fraction of the running cost.
Reduce Chemical Load
Salt and magnesium mineral systems generate sanitiser on-site, lowering the volume of packaged chemicals bought, transported, and handled.
Test Precisely
Balanced water needs less product, not more. Regular, accurate water testing keeps dosing to the minimum effective amount and reduces runoff.
Seal Leaks Early
Investigate any unexplained water loss promptly. A small repair prevents the ongoing waste of water, chemicals, and heated energy.
Equipment choices should suit the specific pool — book a pool equipment inspection before investing.
The greenest litre of water is the one you never lose in the first place. — John Brennan, Practice Lead
Is your pool running efficiently?
Six quick checks. If you cannot confidently tick all six, there is room to lower your running costs and your environmental footprint.
It reduces evaporation, heat loss, and debris in a single step — the most cost-effective upgrade available.
An old single-speed pump is almost always the largest energy draw on the property.
Gas and cheap-import heaters cost far more to run than a quality inverter unit with a high COP.
Salt and magnesium mineral systems reduce the packaged chemicals you buy, store, and handle.
Balanced water needs the minimum effective dose — never guesswork and never over-correction.
Water dropping faster than the evaporation rate points to a leak worth investigating now.
Efficiency and good pool care are the same thing, done properly. — John Brennan, Practice Lead
Eco-friendly pools, answered.
How can I make my swimming pool more eco-friendly on the Central Coast?
John Brennan Pools recommends four high-impact changes to make a Central Coast pool more eco-friendly: fit a pool cover, install a variable-speed pump, upgrade to an efficient inverter heat pump, and reduce chemical reliance through precise water testing. The pool cover delivers the greatest single benefit because it cuts water, energy, and chemical loss at the same time. These measures lower running costs while reducing the pool's environmental footprint.
Do pool covers really reduce water evaporation?
Yes — a well-fitted pool cover can reduce evaporation by up to 90%, making it the single most effective water-conservation step for a Central Coast pool. Evaporation, not splashing or backwashing, is the largest source of water loss from a pool. A cover also retains heat and keeps debris out, so John Brennan Pools regards it as the highest-value efficiency upgrade most pool owners can make.
Are variable-speed pool pumps worth the cost?
Variable-speed pool pumps are worth the investment for most pools because they can substantially cut pump energy use compared with single-speed pumps. A single-speed pump runs at full power whenever it is on, whereas a variable-speed pump adjusts its output to demand and runs only as hard as filtration requires. For most Central Coast pools the pump is the largest energy draw, so John Brennan Pools treats this upgrade as one of the fastest returns available.
Is a saltwater or magnesium mineral pool better for the environment than chlorine?
Saltwater and magnesium mineral systems reduce the volume of packaged chemicals you buy, transport, and handle, because they generate sanitiser on-site within the pool. Saltwater chlorinators still produce chlorine in the water, so the pool is not chlorine-free, but the handling of bulk chemicals is greatly reduced. Magnesium mineral pools are also typically gentler on skin and eyes. John Brennan Pools offers mineral conversions for owners wanting lower chemical handling and a softer swimming experience.
How much money can eco-friendly pool practices actually save me?
Eco-friendly pool practices save money primarily by cutting electricity and water use — the two largest ongoing pool costs. A pool cover reduces water top-ups and heating demand, a variable-speed pump lowers the single biggest electricity draw, and an efficient heat pump heats for a fraction of the cost of gas. The exact saving depends on the pool's size, equipment, and usage, which is why John Brennan Pools assesses each pool individually rather than quoting a blanket figure.
Does an energy-efficient pool add value to my property?
An energy-efficient pool can make a property more attractive to buyers because it lowers the ongoing running costs the new owner inherits. Features such as a quality heat pump, a variable-speed pump, and a fitted cover signal a well-maintained, lower-cost asset rather than an expensive liability. As buyers increasingly value sustainable, low-running-cost features, John Brennan Pools views efficient equipment as an investment in the pool as a long-term asset.
The Eco-Friendly Series.
Uncompromising StandardsLet's get your pool running efficiently.
John Brennan Pools is a specialist pool and spa practice on the NSW Central Coast — assessing covers, pumps, heating, and water chemistry so your pool costs less to run and treads more lightly. Over 25 years of technical experience, owner-led since 2019, no upselling. Because your pool is an investment, not just a backyard feature.
Written by John Brennan
John Brennan is the Practice Lead and Principal Technician of John Brennan Pools, a specialist pool and spa practice serving the NSW Central Coast since 2019. As Principal Technician, John brings over 25 years of hands-on technical experience — across QLD, the NT, and NSW — in diagnostics, clinical water chemistry, and asset preservation. As Practice Lead, he sets the clinical standards every technician on the team is trained to meet, so every engagement is delivered with the same Master-Level Care.
Eco-friendly pool care sits at the centre of how the practice works. Efficient equipment, balanced water, and zero wasted water are simply the markers of a well-run pool — the same standards John applies to every property, whether the goal is lower running costs, a smaller footprint, or both.
Fully Licensed & Insured · ABN 11 202 829 652 · Contact John
References & Standards We Follow
This guidance draws on recognised Australian water-efficiency, energy, and equipment standards:
- Smart Approved WaterMark — independent guidance on pool covers and water-efficient products.
- Central Coast Council — local water restrictions, conservation programs, and pool water guidance.
- Australian Government Energy Rating — energy efficiency information for pool pumps and appliances.
- AS/NZS equipment standards — safety and performance benchmarks for pool pumps, heaters, and electrical equipment.
This page offers general guidance only. Always defer to current NSW regulations and accredited professionals for your specific property.
Across the Central Coast.
Full pool servicing across 90+ suburbs — from Umina to Lake Munmorah and everywhere between.