Green Pool Recovery Cost in Sydney (2026)

By the WTD team · Updated September 2026

Recovering a green pool in Sydney costs $345-$920, typically around $630 spread over two to four visits. The price turns on how far the algae has gone, the size and surface of the pool, and how hard the filter has to work to clear the dead algae out afterwards.

Quick answer — green pool recovery in Sydney

For context, a routine one-off clean on a healthy pool runs about $230 and an ongoing service plan averages $205/month. A green recovery costs more because it's several visits, a heavy chemical load, and a filter run hard for days.

What drives the cost of a green pool

How far it's gone

Algae compounds fast in a Sydney summer. A pool that's been off a week clears with a shock-and-balance in a couple of visits. One left a month grows black or mustard algae that clings to the surfaces and resists chlorine — that's the top of the range.

Pool size and surface

More water means more chemicals. Pebblecrete and tiled surfaces hold algae in the grout and texture, so they take more brushing and longer to clear than a smooth fibreglass shell.

Dead algae has to be filtered out

Once the algae is killed the water turns cloudy and has to be filtered or vacuumed to waste — often running the pump 24+ hours with repeated filter cleans. On a tired filter this is where a recovery sometimes turns up a pump or filter replacement.

Chemical recovery vs drain and clean

Most green pools are recovered chemically — chlorine shock, an algaecide, then a clarifier or flocculant to drop the dead algae so it can be vacuumed out. This keeps the water in and is the cheaper path ($345–$720 in most cases).

A full drain, acid-wash and refill is reserved for the worst black-algae or stained pools where the chemistry is too far gone to rescue. It's labour-heavy and you pay to refill, so it sits at the top of the range and beyond. Draining also carries real risk on a high water table after Sydney rain — an empty fibreglass or concrete shell can lift or crack, so a good operator avoids it unless there's no choice.

Which one for your pool: a Sydney decision rule

The section above explains the two methods. This is how a Sydney pool technician actually chooses between them on the day, and how you can make the call before you ring.

Chemical recovery is the default, and when it stops working

If you can still make out the bottom step, or the pool has been off for less than about three weeks in summer, chemical recovery is the answer and the job sits in the $345–$720 band. Two Sydney details change the odds. Most Sydney pools run a salt chlorinator, and a cell that is fine for daily upkeep cannot shock a green pool on its own, so the technician doses manual chlorine and lets the cell take over once the water clears; do not wait for the cell to fix it. And January to March is the hard season here: warm water and humid nights push chlorine demand up, so a pool left for ten days in January can be further gone than one left a month in May. Book early in the week if you can, because a recovery needs the technician back two or three times over the following days.

When drain and refill is the honest answer

Draining earns its place in the $720–$920 band and above only when chemistry has lost the argument: black algae rooted through pebblecrete grout across whole walls, staining that will not lift, or an older salt pool whose dissolved solids are so high that shock no longer holds. Three Sydney rules apply. First, timing: after heavy rain the water table under much of Sydney rises, and an emptied concrete or fibreglass shell can lift, so a good operator waits for a dry spell and checks the hydrostatic valve before pulling the plug. Second, where the water goes: pool water is discharged to the sewer, not the street stormwater drain, under Sydney Water's rules, and the operator arranges that. Third, the refill is metered, so the water itself is a real cost on top of the labour, and a drain is never the cheap option.

The rule of thumb: green or cloudy with a visible bottom, chemical. Black or mustard algae confined to patches, chemical with extra brushing and a second shock. Whole-surface black algae, permanent staining or a pool that has failed a chemical recovery already, drain, acid-wash and refill, and only once the ground is dry.

Worked example — full green 8m × 4m pool, Sutherland Shire

The cheapest green pool is the one you never get. A regular service plan at ~$205/month works out far cheaper than one bad green-up a summer.

Frequently asked questions

How much does it cost to fix a green pool in Sydney?

Between $345 and $920, with most recoveries around $630 spread over two to four visits. Light green pools sit at the bottom of that range; black or mustard algae from weeks of neglect sits at the top.

Why is fixing a green pool so much more than a normal clean?

A routine clean is one visit (~$230). A green recovery is several visits, a heavy dose of shock and algaecide, and a filter run hard for days to clear the dead algae — so the labour and chemical load are much higher.

How long does it take to clear a green pool?

Light green water usually clears in two to three days; a full green-up can take up to a week of filtering; black or mustard algae takes longer and sometimes needs a second shock.

Should I drain my pool to fix it?

Usually no. Chemical recovery keeps the water in and is cheaper. Draining is only for the worst stained or black-algae pools, and it carries a real risk of the shell lifting or cracking on Sydney's high water table after rain.

Can I fix a green pool myself?

Light green you can often rescue with a shock, balance and plenty of filtering. Black or mustard algae clings to the surfaces and resists chlorine, so it usually needs a professional with the right chemicals and a plan to protect your equipment.