If you’ve noticed that your pool is starting to look green, there is typically one main culprit: algae. When it first starts to take hold, your pool might be a light shade of green. But as the algae continue to bloom, you’ll notice deeper shades of green. There are a number of things that can cause algae development, including low free chlorine, extreme heat, heavy rains and poor circulation. But whatever the cause, it’s important to treat the problem as soon as possible to avoid any potential health issues and get your pool back to its crystal clear state. For green pool treatment in the San Diego area call the experts at Backyard Pool & Spa to get a FREE estimate.