Algae has set up shop in my pool. Now what?
A green pool. It was clear blue last time you swam, but now it is green. If you come across this problem, there is a way out, and a way to return to your summer fun without joining the public pool. The keys to defeating algae exist in persistence and circulation.
There are many ideas and methods people use to kill off algae in their pool. Some of the ways people have used in the past create an unsafe environment for swimmers for days or even weeks to come. Other methods leave you fighting the problem for weeks and defeating the algae just in time to close the pool for winter. Either way, if you go about this the wrong way, you can lose tons of swim time, or even a lot money and sanity. There are a couple approaches to killing algae, but let’s focus on the use of chlorine to accomplish the task.
Using chlorine is a clean and effective way to kill algae. This process requires you to raise your chlorine to a level that “burns” out the algae for a sustained window of time. The amount of time you increase your chlorine level is dependent on the amount of algae in the pool. You will want the chlorine level high until ALL the green is gone from the pool. Many pool owners who struggle with algae can get caught in a terrible cycle of working hard to kill most of the algae, then letting up, and finding it has all grown back again. Remember, persistence and circulation will be key to quickly and effectively eliminating an algae problem. Here are a few steps to fight algae using chlorine:
Is your pool water balanced? pH between 7.2 and 7.8, Alkalinity over 100.
If possible, put your pool filter on recirculate, or bypass the filter. Live, green algae will jam up your filter quickly. At the start, use recirculate so you keep the water moving, and the chemicals mixing. We want to kill the algae first, then filter it out of the water.
If the pool is green, and you can’t see the bottom, begin to dissolve Flohr Pools Algashock in a bucket of water. (Use 5lbs of Algashock per 10,000 gallons of pool water.) This should turn the bucket of water cloudy.
Pour the dissolved Algashock into the pool. I recommend walking the bucket around the pool for even distribution. Just like the bucket of water, the pool should begin to cloud up. The chlorine process should take the pool from a green color to a cloudy white color as it kills the algae. From cloudy, we’ll get the pool clear.
After adding the Algashock, brush as much algae from the sides and bottom as you can and get it into the water. Make an ugly green soup. This will help the chlorine effectively kill all your algae, not allowing it to hide along the sides or bottom. Often times, you are flying blind because the water is so murky, so be systematic in your approach and try to sweep as much as you can.
Keep the water circulating. If the pool has any green remaining in 24 hours, repeat.
Don’t back down now, or the work you did yesterday could go to waste. Each day you should notice improvement. Most algae can be killed in 2-3 days of treatment. If you sweep the pool and you do not see any green, you’ve done it. It’s dead. Now, it’s the clean up.
Your pool should be a milky white. When Algae dies it breaks up into fine particles that will need to be filtered from the water. Begin to filter the water instead of just recirculating it. Using a clarifier or a flocculent can help speed up this process.