Green or cloudy pool water
Treat the water condition and the operating cause together so the problem does not return after clearing.
Use this guide to
Record useful evidence, complete safe checks and recognise when the pool or equipment should remain out of use.
Important limit
A symptom helps narrow the fault. It does not prove which part has failed, whether the water is safe, or whether underground pipework is sound.
Safety first
Do not swim when the water is cloudy enough to obscure the floor, sanitation is not confirmed or chemical treatment is underway. Never mix pool chemicals or add products at the same point and time unless the labels explicitly permit it.
Start with context
Observe before changing settings
Green water often involves algae, but colour and cloudiness can also reflect metals, suspended material, poor filtration or an incomplete chemical correction. A clear pool also needs an operating sanitation and circulation system. Test before adding products.
Safe first checks
Observation is not confirmation
What the signs actually mean
A symptom is just a clue. We still need to test the system properly before we rip anything out or start pouring chemicals in.
| What you observe | What may cause it | What confirms the next step |
|---|---|---|
| Green water and slippery surfaces | Active algae associated with inadequate sanitiser, circulation or brushing. | Inspect surfaces and test full chemistry and equipment output. Colour alone does not quantify the contamination or chemical demand. |
| Cloudy white or grey water | Fine suspended material, filtration limit, chemistry imbalance, dead algae, high bather load or precipitation after dosing. | Test chemistry, inspect filter performance and review what was added and when. |
| Clear coloured water after chemical addition | Dissolved metals reacting with oxidiser, source-water metals or another chemical interaction. | Test source and pool water and review product history before further oxidation or sequestration treatment. |
| Water clears then turns again | Underlying chlorinator, run-time, filter, circulation, debris or stabiliser problem remains. | Verify residual sanitation over time and test the complete operating cycle after recovery. |
Practical sequence
Complete only the checks that are safe
Restrict
Keep swimmers out if clarity or sanitation is uncertain.
Measure
Test the water and confirm pool volume before calculating any treatment.
Restore
Correct circulation and filter operation, brush surfaces and apply products only in the tested sequence.
Verify
Confirm clarity, chemistry and equipment output after recovery rather than stopping when the colour changes.
Stop and arrange help
Do not keep operating or dosing through these conditions.
What remote review can do
Review photos, water results and equipment status to plan the first checks.
Calculate treatment only after reliable volume and test data are supplied.
Identify when a filter or chlorinator fault must be addressed with the water condition.
What cannot be confirmed remotely
Confirm safe swimming water from a photograph.
Identify every dissolved metal or microorganism by colour.
Know the true chemical demand without representative testing and treatment response.
Prepare useful evidence
Clear records reduce guesswork. They do not replace on-site testing where pressure, flow, electrical condition or water integrity must be measured.
Related help
Continue with the right service or tool
Real questions
Frequently asked questions
Where an answer depends on a measurement or site condition, the limit is stated.
Can I swim if the pool is green but I can see the bottom?+
Do not assume colour is harmless. Confirm sanitation, pH and the reason for the colour first. Visibility is one safety check, not proof of acceptable water quality.
Will running the filter clear green water?+
Filtration removes particles but does not replace disinfection. Active algae usually requires a measured sanitation and brushing plan, followed by removal of the resulting material.
Why did shock treatment make the water cloudier?+
Oxidation can leave fine dead material for the filter to remove, or a chemistry interaction can cause precipitation. Test the water and check filter performance before adding more product.
Should I drain the pool?+
Not as a first response. Draining can damage some pool structures and creates disposal and refill issues. It should be considered only after the pool type, groundwater risk and treatment options are assessed.
Need measured confirmation?
Send the observations before the visit
Include the address, equipment labels, wide photos, close photos, readings and what changed before the problem started. Palatial Pools will confirm what can be checked remotely and what needs an on-site test.