How to Get Rid of Green Water in a Swimming Pool
So, you just pulled back that pool cover, dreaming of a crystal-clear oasis, but instead, you’re staring at a green swamp. Yep, it happens to the best of us. But don’t sweat it; you can get that pool back to sparkling in no time. Here’s your no-nonsense guide to turning that green lagoon back into a blue paradise.
A Few Tips to Keep Your Pool Crystal Clear
Chlorine Levels: Keep your chlorine level between 2.0 and 4.0 ppm to prevent algae from developing in your swimming pool.
Daily Maintenance: Use your pool net daily to remove leaves and other floating matter from the top of the pool. It's much easier to remove debris before it settles on the bottom.
Protect Your Clothes: Wear old clothes when using pool chemicals. If chlorine spills or drips on clothing, it may remove some color.
Step 1: Getting Ready to Treat the Pool
Test Your Pool Water
Before you do anything, you need to know what you’re dealing with. Grab your chemical test kit and check those chlorine and pH levels.
If your chlorine levels have dipped below 1 ppm, algae is likely to have set up camp, turning your water green. Time to “shock” your pool back to life.
Balance the Pool Chemistry
To beat the algae, you’ll need to get that pH level to about 7.8. It’s a little higher than usual, but that’s what you need for this battle.
Turn on your pump to circulate the chemicals.
If the pH is too low, bump it up with some sodium carbonate. Too high? Sodium bisulfate is your friend.
Check Your Filter
A good filter is your first line of defense. Make sure it’s free of debris, and give it a good backwash if needed.
Set it to run 24/7 during this process – you want that algae out, and you want it out fast.The good news is that the water area of your pool will not count as impervious coverage. Only the coping and decking around it will. So, if you have a small amount of space for your outdoor living area, the right design should still be able to give you the form and function you desire. Whether you're building in Austin or the surrounding area, it's important to be aware of these restrictions and work with an experienced pool builder who can help you navigate the process.
Scrub the Pool
Algae likes to stick around, literally. Grab a pool brush and get scrubbing. Focus on the spots where algae is most visible.
Got a vinyl pool? Stick with a nylon brush to avoid damage.
If it’s a plaster pool, you can go with a wire brush.
Step 2: Shocking the Pool
*Pro Tip: add chlorine in the evening or at night
. This allows the chlorine to work effectively without being broken down by the sun's UV rays, maximizing its ability to sanitize the pool and ensuring a safer swimming environment the next day.
Shock the Pool
Time to bring out the big guns. Pool shock is high in chlorine – around 70% is ideal – and it’s what’s going to kill that algae dead.
Follow the instructions on your shock package for the right amount to use.
Don’t be surprised if the water looks a little cloudy afterward. The filter will take care of that.
Algaecide to the Rescue
Once the chlorine levels drop below 5.0, it’s time to add algaecide. Let it work its magic for at least 24 hours.
Keep the Filter Clean
As the algae dies, it’ll either float around or sink to the bottom. Keep cleaning that filter to prevent any pressure buildup.
Step 3: Finishing the Job
In summer, test your pool water daily as heat, sunlight, and heavy use can quickly disrupt chemical balance.
Run Your Pool Cleaner
Now that the algae is dead, it’s time to clean up. Use your pool vacuum to suck up all those dead particles. If they’re giving you trouble, a flocculent can help bind them together for easier cleanup.
Run the Filter
Keep that filter going until your pool water is crystal clear. If any algae dares to return, repeat the shocking and treating process until your pool is pristine.
Check Chemical Levels Again
Before you declare victory, re-check your pool’s chemical levels. Everything should be back in the normal range, ready for you to dive in.
Now, grab that cold drink, kick back, and get ready to enjoy your pool—green water, no more. If you have any other questions or need a hand with your pool, don’t hesitate to reach out at (512)883-POOL here at Austin Dreamscapes has got you covered!