Quick Answer
You can often narrow down the likely category of a problem by looking at the water, surfaces and equipment—but you cannot reliably diagnose pool chemistry by appearance alone. Green, cloudy, foamy or strongly scented water can have more than one cause. The safest next step is to combine what you see with a current water test and a quick circulation and filtration check.
Interactive Visual Guide
Choose the condition that looks closest to your pool. Every interactive section below will update to match the problem you choose.
How to use it: click one labelled photo. Your choice will get a red outline and a ✓ Selected badge, and the troubleshooting sections below will change to match it.
Choose a condition
Pick the labelled photo that looks closest to your pool. This guide narrows the issue without pretending a photo can replace water testing.
What Should I Test?
The most useful tests depend on what you are actually seeing. Select a condition and this section will build a problem-specific testing checklist.
What Else Should You Check?
Depending on the symptom, the next useful check may involve circulation, filtration, surface cleaning, recent products, debris or the pool’s water source.
Common Misunderstanding
Choose one of the visual conditions above and this section will explain a common misconception about that specific symptom.
A photo can help narrow the category, but current water-test results and equipment observations are what should guide treatment.
Local Water-Care Help
Custom LeisureScapes supports pool owners from its London and Stratford showrooms and serves surrounding Southwestern Ontario communities across Middlesex, Perth, Elgin and Oxford Counties, including St. Thomas, Strathroy, St. Marys, Dorchester, Woodstock, Ingersoll, Komoka and Grand Bend.
If your water problem keeps returning, the equipment is not circulating normally, or the chemistry does not make sense, the next step may be professional water testing or pool service rather than another guess at the chemical shelf.
Never mix pool chemicals, combine leftovers, improvise a dose or add products simply because the water resembles a photo online. Keep products in their original containers, follow the product label and equipment manufacturer’s directions, and use a current water test before correcting an unfamiliar condition. If you are unsure what has already been added, get professional guidance before adding something else.
Pool Water FAQ
Green water commonly points to algae, but it can also be influenced by sanitizer performance, circulation, filtration, organic load or—in some cases—metals. Test the water and inspect circulation before choosing a treatment.
Cloudiness can involve fine suspended particles, filtration, circulation, pH or alkalinity balance, calcium, organic contamination or sanitizer that is present but not working effectively. A full test is more useful than a single chlorine reading.
A strong pool smell is often associated with chloramines rather than simply “too much free chlorine.” Compare free chlorine with total chlorine and check pH before deciding what the water needs.
White deposits can be associated with calcium scale and overall water balance. Calcium hardness, pH, total alkalinity, temperature, evaporation and the pool surface all matter, so the deposit should be assessed together with current test results.
Brown, orange or rust-coloured staining can be related to metals such as iron, but organic staining can look similar. Note where the stain appears, whether the water itself is discoloured, and have the water tested before treating the surface.
Yes. Reduced circulation, dirty baskets, filter loading, air in the system or other equipment problems can contribute to poor clarity. Compare flow and filter pressure with the normal baseline for your pool and request service if operation is abnormal.
Custom LeisureScapes has showrooms at 775 Wharncliffe Rd S in London and 404 Erie St in Stratford. The company’s pool-opening guidance directs customers to bring a water sample to the store for balancing, and professional pool service is also available when the problem involves circulation or equipment.
Clearer Water Starts With Better Information
Bring a current water sample and your notes about what changed—water appearance, recent weather, products added, circulation, filter pressure and how quickly the problem returned. That gives the Custom LeisureScapes team a much better starting point than guessing from colour alone.