Why is My Pool Green?

When you imagine your pool, you see a crystal clear oasis of serenity, glistening in the sun, inviting you to jump in for a refreshing swim any time of the day or night. But bodies of water that have nowhere to flow tend to collect bacteria and algae, if not properly maintained. Both bacteria and algae, which grow over time, can change your pool to a very unserene color of green. The level of effort put into getting a green pool cleaned up depends on how long the buildup has been allowed to progress. Since an ounce of prevention is worth a pound of cure, it’s good to know what causes a green pool in order to avoid the mess altogether.

Keep your pool clean by keeping an eye on these potential issues:

Little or no chlorine in the pool – Chlorine kills bacteria and algae. If there’s not enough chlorine, your pool can turn green.

Chlorine bound by chloramines – Chloramines are the chemical byproducts that build up in the water when it’s improperly treated with too little chlorine.To resolve this the pool will need to shocked

pH Value too high. – pH is a measure of how acidic or basic the water is. A number of different factors can contribute to a high pH level in a swimming pool. Everything from weather to oils, dirt, and cosmetics affect your pool water balance – in short, anything that comes in contact with your pool water. When the pH level of the pool is too high, it causes the chlorine to become ineffective.

Not enough cyanuric acid (CYA) – CYA is a water conditioner often referred to as “sunscreen for chlorine” that prevents chlorine evaporation by the sun. Also to much CYA can render the chlorine ineffective. If CYA is low you can simply add it too bring it to the proper level. Ideally between 40 – 80ppm. If it is over 100ppm the pool water will need to be replaced to bring the levels down.

Not enough circulation/filtration time – Circulation of the pool water keeps it filtered and clean. It also helps to spread the chemicals you add to the water. Think of a cup of coffee after adding cream and sugar. It needs to be stirred. Same with the chlorine and CYA that goes into your pool. But for how long? The typical time is one hour for every ten degrees of air temp as a starting point. If it’s 100 degrees out, the pool pump needs to be running at least ten hours a day.

If you’ve already got enough things to keep an eye on, give us a call to regularly vacuum your pool, check chemical levels, and clean your filters. If you discover your pool has turned green, it’s a good idea to talk to an expert to make sure you are using the correct products to treat it. It’s not difficult to treat the problem, but you’ll want to make sure that you’re doing what needs to be done to bring your pool back to normal.

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