You need to raise the level of your chlorine – shock the pool – and maintain that high level until all the algae is dead. This may take 3 to 4 days. RUN THE FILTER 24 HOURS A DAY. You must maintain that high level of chlorine.
How long will it take to clear the pool? A fiberglass pool in its worst condition can be algae-free in 24 hours. For a vinyl liner pool, the process can take 3-4 days. For a concrete pool, this can take a week or more.
Adding shock to your pool super-chlorinates your water. And this extra dose of sanitizer will kill algae growth. The more serious your pool algae problem, the more shock you'll need. We recommend using calcium hypochlorite shock, or cal-hypo shock, as an effective algae treatment.
When applying Wet & Forget to black algae, you should start to see results 1-2 months after your application. When applying Wet & Forget to green algae, you should start to see results 1-2 weeks after your application. Wet & Forget's gentle gradual process gets the job done.
So How Much Shock Treatment for Green Algae? Recommended Treatment: 2LB of Calcium Hypochlorite for every 10,000 gallons of pool water.
Whether mild or severe, it isn't recommended. Significant amounts of swimming pool algae welcome a breeding ground of harmful bacteria that feed on algae.
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.
There are a lot of reasons why algae keep returning to pools. The most common of these reasons are: Low levels of chlorine or chlorine getting burned up too fast before it gets the opportunity to kill the algae. Improper filtration and lack of water circulation can also lead to algae coming back to your pool.
Chlorine is still one of the most effective killers of algae so doing a super-chlorination of 10-20 ppm of chlorine can go a long way towards wiping out the algae. Liquid chlorine is an ideal shock for algae because it is fast acting and does not add cyanuric acid (CYA) or calcium to the water.
Apply a mustard algaecide following the label directions. Allow the water to circulate for 24 hours. Use a pool vacuum or backwash the pool again to remove the remaining dead algae. In persistent cases, brush the pool and apply algaecide once more after two to four days.
Once algae gets into your pool water, they can turn into an algae bloom if you have nitrates, out-of-balance chemicals, warm temperatures, sunlight, carbon dioxide, or phosphates. Poor water circulation, poor filtration, and not sanitising your pool will also contribute to rapid growth.
Over the next 2–3 days, the chlorine levels will continue to kill all the algae in your pool water, so test daily to maintain your swimming pool at the proper levels. Keep your pool at the following levels so the shock treatment continues to destroy the rest of the algae: Free Chlorine: 2-4 ppm. pH: 7.2 – 7.6.
It's often recommended to shock your pool once a week. If you don't do it every week, you should at least do it every other week. This is necessary to maintain your pool's water chemistry. If you have a lot of people over in your pool or have a party, you may want to shock your pool more frequently.
Algae and aquatic plants are usually green but can appear yellow or brown as they die down.
No matter how badly you'd like to cool off, if your pool water is green due to algae growth, you may want to reconsider diving in. Green algae welcome the growth of bacteria like E. Coli. By choosing to swim in a pool with algae, you run the risk of developing a rash, infection, or illness.
Double or Triple Shock the Pool
This process involves adding chemicals to the water in order to keep it balanced and raise the free chlorine levels. When working against a green algae problem, a double or triple dose is necessary. The increase in chemicals will kill algae and bacteria.
Pools can immediately turn green after shocking when they have metals like copper in the water. These metals oxidise when exposed to high levels of chlorine which makes the pool water turn green.
Even high quality copper-based and silver-based algaecides will cause foamy pool water, if too much is applied.
Can you put too much shock in a pool? SKIMMER NOTES: It's unlikely but it could happen. It would take a lot of shock to really make the water unsafe for swimming. The best way to make sure you're safe to swim is to test your pool water and make sure free chlorine levels are between 1-4ppm for healthy swimming.
Scrub the black algae away with a good, stiff pool brush. This will help break down the protective layer and make it easier to treat. Break a chlorine tablet in half and rub it directly onto the affected areas. The chlorine treatment will kill the algae's roots and prevent it from coming back.
Also, if neglected over a long period, bacteria associated with algae can be a health concern. Running your filter when the pool is covered with algae can clog up the filter and even damage it permanently.
Small, isolated blooms can be treated locally with granular chlorine or a good quality pool algaecide, followed by a stiff brushing. Algae growing over larger sections of the pool, or suspended in the water will require a strong dose of chlorine pool shock, or granular chlorine, to kill the algae.