Problems

All problem guides

Every symptom hub in one place. Newest first — tags show the symptom family.

Pool water testing context
Surface & stains

Metal stains

Brown or blue-green marks from metals.

See steps
Pool surface after heavy rain with debris
Color & clarity

After heavy rain

Dilution, debris, chemistry reset.

See steps
Saltwater pool with mild algae tint and salt cell
Color & clarity

Saltwater algae

SWG-safe treatment — protect the cell.

See steps
Green pool water post-shock with chlorine bucket
Color & clarity

Still green after shock

CYA too high? Dose too low? Why it stuck.

See steps
Clear pool water and surfaces
Surface & stains

Scale & calcium marks

Hard water deposits on tile and equipment.

See steps
Hot tub foam context
Foam & film

Foam on the surface

Pool or spa foam — different causes.

See steps
Clear swimming pool water
Smell & feel

Eyes burn / irritates

Balance first — not a medical diagnosis.

See steps
Pool water surface in bright sun
Smell & feel

Strong chlorine smell

Often chloramines — not “too much chlorine”.

See steps
Pool water context for algae types
Color & clarity

What kind of algae

Green vs mustard vs black — what changes.

See steps
Cloudy murky pool water
Color & clarity

It’s cloudy / murky

Clarity without panic dosing.

See steps
Green pool water with algae
Color & clarity

It’s going green

Algae roadmap: brush, filter, chlorine.

See steps

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