A pool turning green rapidly is almost always caused by a sudden algae bloom. Algae are microscopic plants that can multiply in a matter of hours when the environment and chemistry in your water align.
Clearing a green pool fast requires killing the algae and filtering out the dead debris. To get your water sparkling blue in 24 to 48 hours, follow this proven, step-by-step shock treatment:
If your pool is green and cloudy, it's likely an algae problem. Algae can persist in a pool even after shocking. A green pool – especially one that turned green overnight or after rain, can also be from a pool pump that isn't properly circulating water or an issue with your filtering system.
Yes, vinegar is a highly effective, natural, and inexpensive way to kill green algae on hard outdoor surfaces like patios, decks, and siding. The acetic acid in vinegar penetrates and breaks down the cell walls of the algae.
Yes, shock is the primary treatment for a green pool, as it almost always means an algae bloom. To kill the algae effectively, you should use a "double" or "triple" dose of shock depending on how dark the green is, and run your pump continuously until the water clears.
Run Your Pool Filter for 8 Hours (And Shock Again If Needed) After you shock at night, your should run your filter system for at least 8 hours overnight. Even better, you should run your filter 24 hours a day until your pool is completely clear.
Alternatives to Chlorine In Pools You Could Consider
Barley straw. Barley straw is a natural way to fight algae. On contact with water, the straw starts to break down, and as it does so it releases peroxides into the water which combat algae. Available in mini bales, or as a concentrated extract of barley straw liquid, it's a natural way of chemically fighting algae.
Dawn dish soap itself does not chemically kill algae. However, it acts as an excellent surfactant. It breaks the surface tension of water and lifts algae off surfaces, making it highly effective when used alongside mechanical scrubbing or as an additive in DIY exterior cleaning solutions.
While white vinegar is an excellent natural cleaner, its acidity means it can damage certain surfaces, strip finishes, or cause rust. You should generally avoid using it on:
Dead algae in a pool typically turns gray, white, or a dull, pale brown. It often settles as a fine, dusty layer on the pool floor or clouds the water, rather than clinging to the walls.
To get crystal clear pool water, you need a 4-step routine: balance your water chemistry, shock the pool to kill contaminants, run your filter continuously, and use a clarifier to remove microscopic particles.
When your pool water is perfectly clear but has a green tint, the issue is almost always dissolved metals, specifically copper or iron. Unlike an algae bloom—which makes the water cloudy and murky—metals dissolved in balanced water will look completely transparent but emit a distinct green hue.
We recommend using our Super Pool Shock, which contains 73% chlorine. Use a pound of shock for every 15,000 gallons of pool water. Depending on the severity of the algae, you will likely have to shock twice, if not three times. Wait 12 hours between each shock treatment.
Shock & Floc
Depending on the amount of algae in the pool, and other organic debris, you may need 2 to 4 lbs of granular shock or 2-4 gallons of bleach - per 10,000 gallons of pool water. Test your chlorine level the following day, and if it's low, or if the pool has returned to a greenish color, shock the pool again.
Brush hard surfaces with a stiff broom or wire brush to remove established growths. Brushing on a regular basis helps to prevent growths from taking hold. Use a pointed weeding tool, or old knife, to remove mosses from the cracks between paving. Use a pressure washer to remove growths quickly.
To make the solution is simple and easy on the wallet! Pour equal parts of vinegar and Dawn into a spray bottle. Gently shake, then spray liberally onto the surface to be cleaned. I have found the best results is when I use it to clean chrome shower and sink fixtures.
It will add phosphates to the pool, make it smell nice, and maybe make some bubbles. Other than that, nothing will happen. A lot of pool guys use diluted dish soap to help clean and net the surface of the pool when it's covered with small debris. They still do it though.
Yes, pool shock is the most effective way to kill algae. By adding a highly concentrated dose of chlorine to your pool, you rapidly spike the free chlorine levels to overwhelm and kill algae spores, clearing up a green pool.
Be sure that the pennies are 1982 or older. The chemical reaction of the copper in the pennies keeps the water clear and algae free. I went through an old coin jar and found plenty. Before 1982, pennies were 95% copper and 5% zinc.
To remove dead algae from your pool, first brush the pool walls and floor to dislodge the remaining particles, then let them settle to the bottom. Finally, manually remove the debris by "vacuuming to waste", or use a Pool Flocculant to force them to the bottom so they are easier to siphon out.
Getting rid of pool algae without chemical algaecides requires heavy mechanical labor and physical filtration. You can do this by thoroughly brushing all pool surfaces to dislodge the algae, vacuuming the pool directly to waste, cleaning your filter, and running your pump for 24-48 hours until the water clears.
A cowboy pool (also known as a stock tank pool) is a large, galvanized metal livestock watering tank that has been repurposed into an above-ground swimming or soaking pool. They offer an affordable, stylish, and low-maintenance alternative to traditional in-ground pools.
Ozone: preferred by many public pools
It is twice as effective as chlorine. Ozone makes water pleasant, odorless and good-tasting (it is also used to disinfect drinking water). This is why it is very popular with public pools which can amortize its high cost of acquisition more easily.