The quick answer
A green pool usually needs more than one chemical addition. Recovery combines accurate testing, debris removal, brushing, circulation, filtration and follow-up.
Start with a diagnosis
Green water may come from algae, metals or both. Inspect visibility, circulation, filter condition and current chemistry before choosing a treatment path.
Why cleanup takes time
As algae is killed, the filter must capture suspended material. Severe cases may require repeated brushing, vacuuming, filter attention and water tests. Keep swimmers out when the deepest area is not clearly visible.
Equipment must work
A pump that will not prime, a blocked filter or weak return flow can prevent treatment from working. Equipment problems need to be corrected rather than covered with additional products.
What affects the quote
Pool size, visibility, debris, chemistry, filter type and length of neglect affect the labor and materials required. Recovery is normally quoted separately from routine weekly maintenance.
Preventing a repeat
After the pool clears, maintain consistent sanitizer, brushing, debris removal and filter monitoring. Sudden chlorine loss should be investigated early, especially after storms or heavy use.