Coast Spas Combined Chloramines / Poor Ventilation

Strong chemical or chlorine smell from spa water.

Possible Causes

High combined chlorine due to inadequate shocking, Overdosing sanitizer in Coast Spas water, Low pH causing off-gassing, Cover left closed immediately after shocking

How to Fix / Troubleshooting

Safety first: Avoid prolonged inhalation of strong chemical fumes. Ventilate the area if the spa is indoors.

Test water: Check free and total chlorine or bromine levels and pH.
Shock treatment: Perform a shock treatment to break down chloramines, following label directions.
Adjust pH: Bring pH into the 7.2–7.8 range using pH increaser or decreaser.
Vent cover: After shocking, leave the cover partially open for 20–30 minutes to allow gases to escape.

Repair Difficulty

Very Easy 1/5