Green Swimming Pool? Professional Treatment Service — Buckinghamshire, Berkshire & Oxfordshire
A green pool is one of the most common problems pool owners face — and one of the most fixable. Algae takes hold quickly when chlorine levels drop, circulation falters, or the pool sits untreated after heavy rain or a period of neglect. The good news is that with the right treatment applied in the right order, most green pools return to clear, safe, swimmable water within a few days. As a result, you don’t need to guess at it — Rob covers the full recovery process from start to finish.
Why getting the chemistry right first matters. Dumping chlorine into a green pool without first adjusting pH and alkalinity is one of the most common mistakes — and it wastes money. The reason is simple: shock treatment only works effectively within the correct pH range. Therefore, getting the chemistry right before applying any treatment is what makes the difference between a pool that clears in two days and one that stays cloudy for two weeks. In short, don’t just shock and hope.
Why pools turn green
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Chlorine levels have dropped
Algae establishes rapidly once free chlorine falls below effective levels — especially in warm weather or after heavy rain.
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pH out of range
High pH renders chlorine largely ineffective even when levels appear normal on a test strip — algae thrives in the gap.
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Poor circulation or filtration
Dead spots in circulation allow algae to establish in corners, on steps and around fittings before spreading through the pool.
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Pool left untreated
After heavy rain, time away, or a missed treatment cycle, algae can take hold within 24 to 48 hours in warm conditions.
How the recovery process works
Every green pool is different. As a result, the treatment has to be tailored to what’s actually going on with your water — not a generic fix. Here’s how Rob approaches it.
01
Full water test
First, Rob tests pH, alkalinity, chlorine, calcium hardness and stabiliser levels on site. The chemistry has to be right before any treatment begins.
02
Chemical correction & shock
Next, pH and alkalinity are adjusted. He then applies a calculated shock dose — the right product at the right level for your pool volume and algae severity.
03
Circulation & filtration check
Rob checks your pump, filter and circulation to ensure dead algae clears efficiently. A blocked filter at this stage significantly slows recovery.
04
Floc or clarifier if needed
For heavily affected pools, a flocculant or clarifier helps dead algae bind together and clear faster — reducing the time to a swimmable result.
05
Brush & vacuum
Dead algae settles on floor and walls. Thorough brushing and vacuuming to waste removes it before it breaks back down and clouds the water again.
06
Follow-up & prevention advice
Finally, Rob explains what caused the problem and what to change to stop it happening again — whether that’s a maintenance schedule, equipment fix, or both.
What’s included in the visit
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Full water chemistry test
pH, alkalinity, free chlorine, calcium hardness and stabiliser — all tested on site before any treatment is applied.
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Chemical treatment plan
Calculated to your pool volume and current water condition — not a generic dose that may under or over-treat.
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Filter & circulation check
Rob inspects your filter condition, pump operation and circulation pattern to make sure recovery can proceed efficiently.
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Honest assessment of the cause
Rob will tell you exactly why the pool went green and what needs to change to prevent a repeat — equipment, routine or both.
Areas covered
High WycombeMarlowBeaconsfieldGerrards CrossAmershamMaidenheadWindsorAscotReadingHenley-on-ThamesCookhamWooburn Green
Got a green pool? Get in touch and Rob will talk you through the recovery options. Based in High Wycombe, covering Buckinghamshire, Berkshire and Oxfordshire.
