Learn More › A green pool is usually caused by algae overgrowth. Other potential causes include pollen, metal oxidation, low chlorine levels, high pH, or a malfunctioning filter. Homeowners can ...
Narrator: Thick green algae blankets, frogs, green-stained tiles, and mosquito nests. These are just a few things that can be found inside a pool that's been left to sit for a few years or even a ...