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Green Pool Water

How to Get Rid of Green Pool Water Fast!

You bought your pool for pleasure and family enjoyment. However, when the inviting, crystal clear pool water happens to turn green, that changes the picture for everyone. Green swimming pool water can turn your pool from a great place to play and have fun into looking like a farm pond. This is by far the leading frustration and issue for many pool owners. Fortunately, having green pool water can be a learning experience, just a temporary problem that is not too difficult to get under control. We will show you what you need and the action to take. Read on to find out how to get rid of green pool water and what you can do to prevent it again in the future.

Why is My Pool Water Green?

Green pool water is algae (plant) infestation that has bloomed and is now thriving due to the ideal water condition it has to grow. An "algae bloom" can turn your pool water from clear rather quickly if you are not watching from the symptoms. Despite your best efforts to do what you think is right, or following the instruction you were given to maintain the water, your pool might suddenly exhibit green water. It's important to note that green swimming pool water does not just spontaneously occur without good reason. The most common culprit behind pool algae bloom is imbalanced pH levels in the pool water or not maintaining a proper chlorine sanitizer level.

Ideally, your pool water pH level should be maintained between 7.4 and 7.6. Although, according to pool water test kits the pH level is acceptable within the range of 7.2 to 7.8. This is true, however, your target for adjustment should always be to bring the pH level into the optimal balance between 7.4 and 7.6. When the pH level gets too high or too low, the chlorine present in the water does not work as effectively and now your pool becomes vulnerable to algae development, even though you can not see it yet. It is a common mistake to believe that because you are adding chlorine to your pool, that it is enough to keep the water algae free and clear. Chlorine requires an optimal pH level to do perform its job as expected. Letting the pH level get out of balance can cause an abundance of algae spore in your pool.
It is also important to know that pool chemicals alone will not maintain pool water clarity and safety. You must also be able to have good circulation of the water and filtering. This allows the chemicals to be dispersed around the pool and helps prevent algae spore the opportunity to accumulate and attach to the pool floor and walls. Allow the water to circulate and move freely without restriction by cleaning the skimmer and pump baskets frequently. Routinely backwash a sand filter, clean a cartridge and regenerate or change the DE pool filter media; depending on the filter type you have, to ensure that it is capable of performing proper filtration without  impeding the flow.

The Steps to Cure Green Pool Water

If your pool water has turned green, there is a fast, more effective method of treatment that you should follow to remedy the algae condition. Do not allow anyone to tell you to go buy and apply allot of algaecide to get rid of the algae. It will not, so save your money. Most algaecides are for prevention. Based on what we learned above, the first thing you need to do is to test the pH level of your pool water. If your pH test reading shows the pH is too high (above 7.6), use Blue Wave pH Reducer (granular sodium bisulfate) to lower it. If the pH is too low (below 7.2), use Blue Wave pH Increaser (granular sodium carbonate, soda ash) to raise it. If it is an issue for you to calculate the amount you need to add to your pool based on your test results, we can help there too. Our Aqualator will calculate the daosage perfectly for you everytime. Just enter your water test readings and it will give you the treatment without having to take a water sample to a pool store.   

After testing and adjusting any pH level imbalance, brush the sides and bottom of the pool thoroughly to loosen any algae that has become attached. Add granular chlorine to the water - in other words, "shock" it with  at least “six times” your weekly maintenance dose of chlorine pool shock for super chlorination (5ppm to 10ppm available chlorine) for your pool capacity. Administer this large shock treatment all at one time. The recommended shock dose required for weekly maintenance for a clear swimming pool is 1-lb. or 1-gallon of full strength pool shock per 10,000 gallons of pool water for a proper shock treatment. The reason we specify a full strength chlorine pool shock like Blue Wave Blast Out or Blue Wave Burst vinyl liner safe pool shock, is so you will now be aware that pool shock treatments are being sold, primarily by the mass merchants, which contain very weak blended formulas and amount of chlorine. These weaker products are half as effective than our full strength 65% calcium hypochlorite shock formula and therefore you would have to buy and use over twice as much of the other product to achieve the same result that you expect. There is no low price to that scenario.

After the proper amount of pool shock has been added, run the filtration system for a minimum of 24 to 30 hours straight; this helps to circulate the chlorine in order to kill off and oxidize the algae as effectively as possible. The next day, vacuum the pool thoroughly in order to get rid of any algae that remains. After circulating a minimum of 24 to 30 hours, if the pool is not yet clear, backwash, clean the filter and test the chlorine level. If the chlorine level is low, you still need to add an additional couple of pounds or gallons of shock to complete the cure because the contaminant level was very high. Additional filtering will also be required.

Preventing Green Pool Water
The key to avoiding green pool water is truly not very difficult: testing pool water weekly for proper pH, total aklalinity and primary sanitizer levels and then addressing imbalances promptly using the right pool chemicals. The best method is to develop a pool care routine. This means setting a day of the week to preform the testing and adjusting the water balance. Shock your pool on this day every week and more frequently if you experience periods of rain or high heat. When you do shock the pool, use the right kind of shock and correct amount for your pool capacity. By setting a simple schedule you'll develop a pool care routine that works for you. Running the filter long enough each day, a minimum of 12 hours, will help to avoid algae blooms and many other pool water problems.

Many pool owners have found it beneficial to add an algaecide to their weekly pool care routine. As we mentioned before, pool algaecides are to be used primarily for algae prevention, rather than for a cure to existing algae bloom. They provide a second-line of defense against algae spore growth and reoccurring pool algae conditions. Owning and caring for the pool water quality is truely not hard to keep it in great shape. Use high quality chemicals. Maintain a minimum of 1-3ppm of available chlorine residual in the water at all times and develop your weekly pool care routine. Do not miss your day to shock the pool. You will find that is only requires minutes of your time one day each week to stay ahead of pool problems, prevent algae and green pool water.