Why Is My Pool Green? The Complete Fix Guide for Houston Pools
If your pool has turned green, take a breath — it's one of the most common (and most fixable) pool problems in Houston. Every week during summer, our phones ring with this exact question.
Why Does Pool Water Turn Green?
Green water is almost always an algae bloom, and it happens when three things line up:
- Low or no chlorine — the algae's open invitation.
- Poor circulation — cloudy, still spots give algae a place to settle.
- Heat and sunlight — Houston's summer does the rest.
Other culprits include low cyanuric acid (stabilizer), a dirty filter, or high phosphates feeding the algae. And yes — a rare cause is copper staining from corroded equipment, which needs different treatment. That's why the right diagnosis matters.
Can I Fix It Myself?
For light green water, sometimes. The DIY route looks like this:
- Brush all walls and floor aggressively to break up the algae.
- Vacuum the dead algae out (to waste, if possible).
- Shock with 3–5x the normal chlorine dose.
- Run the pump 24 hours until the water clears.
- Re-test and rebalance chemicals afterward.
If the water is dark green or has been green for weeks, DIY gets expensive fast — you'll burn through chemicals and still see algae. That's when a professional green-to-clean service saves you money in the long run.
Our promise: we'll tell you honestly whether you can handle it yourself or whether it's worth hiring us. Sometimes the best advice is a trip to the pool supply store.
How We Restore Green Pools
Our green-to-clean process gets most Houston pools swimmable within 3–5 days:
- Full water test to identify exactly what's out of balance.
- Algae treatment and aggressive brushing.
- Repeated vacuuming of dead algae.
- Proper shocking — the right amount, the right way.
- Filter maintenance so the debris actually leaves the water.
- Re-balancing so the green doesn't come back.
Preventing the Green
Prevention is a whole lot cheaper than recovery:
- Keep chlorine in range at all times — especially in summer.
- Run your pump 8–12 hours daily.
- Shock after storms and heavy use.
- Stay on top of brushing, even if the water looks clear.
- Consider weekly service — it's the simplest insurance policy.
Pool already green? Text (832) 540-8440 or request a quote — we'll get you back in the water fast.
Green Pool? We Can Fix It
Fast, honest green-to-clean service across Houston.