Even with regular maintenance, many swimming pool owners find themselves struggling to keep algae from taking over. From fast-growing green algae that can cloud water to the black buildup that takes root in crevices and cracks, there are several thousand algae species that can inhabit pools and spas. In addition to materials that swimmers bring into the water with them, millions of algae spores are carried by the wind on a daily basis€"and can easily end up settling down in your outdoor pool.

The four primary types of algae can be identified by color: green, pink, yellow, and black. Each type behaves a little differently, and will have specific prevention and removal requirements. Green algae is the most common variety and can grow extremely quickly. However, while green algae can typically be eradicated using adequate chlorination, black algae removal can be considerably more difficult to remove permanently, leading many pool owners to seek professional assistance.

While increasing chlorination and rebalancing pH levels is typically enough to prevent and remove green and pink algae, black algae treatment usually requires rigorous measures. This persistent microscopic plant forms in surface crevices and tight spots, particularly in the shady areas of the pool. Plaster finishes are especially prone to being overrun by black algae growth. This type of algae will put down roots in plasters and grouted areas, and these roots must be eradicated in order to prevent a rapid return. The highly resistant nature of this form of plant contaminant makes black algae removal a perennial nuisance for many pool owners.

If you discover the beginnings of the growth of black algae in pool or spa areas, you should make sure to address the issue as soon as possible in order to eliminate the chance of recurrence and prevent damage to pool materials€"as well as long-term staining. Even if you generally perform the regular cleaning and maintenance on your backyard pool, hiring a professional service is often advised in the case of black algae growth. Professional pool cleaners will be better able to evaluate the severity of algae growth, gauge the degree of hard scrubbing needed to eliminate roots in cracks and crevices, and have access to professional and commercial-grade chemical treatments and algaecides that are much more effective than typical residential products.

In addition to better tools and techniques, a pool cleaning professional can also help to provide an assessment of your current maintenance routine and offer advice about chlorine and pH levels, filtration systems, and other tips for keeping your home swimming pool safe, clean, and comfortable all year round.