When it’s in pristine condition, your swimming pool can provide hours of enjoyment during the hottest days of the year. However, when the water suddenly turns green, you may be hesitant to go for a dip. This sudden discoloration is typically due to the presence of algae, which can occur for several reasons.

The Meaning Behind Green Pool Water

What Causes It?

The most basic reason swimming pool water turns green is that it isn’t properly maintained. Proper chlorination levels are essential because chlorine kills harmful algae and bacteria. Without enough of this chemical, the water can easily turn an unsightly shade of green.

Additionally, if the water’s pH balance is too high, the chlorine may not be as effective at killing off the algae. Neglecting to replace the filter can also contribute to this problem as it’s designed to promote proper circulation and remove debris that attracts algae.

How Do Nitrates Contribute?

Nitrates encourage algae growth and subsequent green water. Yard runoff, acid rain, and animal contamination are to blame for the discoloration when nitrates end up in the pool. Since the nutrient easily sticks to the pool walls, it creates a friendly environment for algae to grow swiftly. To eliminate this substance, you may need to drain the water and establish a drainage system to prevent future runoff.

What About Phosphates?

Phosphate is a chemical compound that’s a natural source of food for plants, and its presence will give the water a green hue. Much like nitrates, phosphates can end up in the pool through runoff from your garden, such as leaves or twigs that make their way inside the pool.

As algae begin to develop, they store the phosphates in their cells. Even if you drain the pool water, the algae that remain will continue to feed off what they stored and create the same problem when you add fresh water. To end this cycle, use a chemical in the water that’s formulated to specifically kill off algae blooms.

Can You Prevent Green Water?

Proper circulation is key to keeping your swimming pool healthy. Schedule pool maintenance regularly, clean the skimmer frequently to make sure that all sanitizing elements flow freely, and back the filter to prevent it from clogging.

If you’d like professional help keeping green water at bay, contact the skilled team at Pool Pro in Kihei, HI. Since 1985, these experts have provided Maui homeowners with a variety of swimming pool services, including construction, inspections, and repairs. They also offer several maintenance products, like thermometers, testing supplies, and chemicals. Learn more about their pool cleaning services online, or call (808) 879-3294 to schedule a free water analysis.