Finding green water is stressful—especially if guests are coming or you just got home from a trip. Take a breath. Green usually means algae and insufficient residual sanitizer, and it is almost always recoverable. How fast and how expensive depends on severity and how you respond in the first day.
Step 1: Don’t swim
Until the water is properly sanitized and clear, stay out. Green water is a sign that the protective barrier of good chemistry has failed.
Step 2: Check the basics
- Is the pump running?
- Are baskets clogged with leaves or debris?
- Is the filter pressure sky-high?
- Was there a power outage, multi-day shutdown, or heavy dust event?
If the pump is dead, the filter is blocked, or water won’t circulate, chemistry alone won’t finish the job. Fix circulation first—or call a pro to do it.
Step 3: Remove what you can see
Skim large debris and brush walls if it’s safe to do so. Algae clings to surfaces; brushing helps treatment reach it. Avoid dumping random combinations of products without testing.
Step 4: Decide DIY shock vs. professional recovery
Possibly DIY: water is only slightly dull/green, equipment works, you’re comfortable testing, and you can brush and filter continuously.
Call a pro: water is opaque, blackish, or foul; you can’t see the main drain; filter clogs immediately; equipment is unreliable; or you’ve already shocked with no progress.
Severe blooms often need multi-day filtration, repeated brushing, and filter cleaning. That’s normal—not a sign you “failed.”
What professional green pool recovery includes
At Blue Diamond Pool Services, recovery typically includes evaluation, treatment, brushing, filtration support, and a plan for follow-up so algae doesn’t rebound. Learn more on our green pool recovery page.
After the water clears
Clearing the bloom is half the win. Preventing the next one means addressing the cause: short pump schedules, a tired salt cell, a dirty filter, or simply no coverage while traveling. Weekly pool cleaning is the simplest insurance policy for Las Vegas homeowners.
Prevention checklist
- Maintain weekly professional service during travel season
- Keep baskets clear after windy or dusty days
- Watch salt system alerts and chlorine residuals
- Clean filters on a realistic schedule
- Have a post-storm plan during monsoon and wind season