Pool and Spa Materials Glossary of Terms


Fine-spun filaments of glass which are available in a rope or mat form. When used in a process with polyester resins, catalysts and hardeners can be formed or moulded into pools, spas and related shapes.


A condition caused by too much copper in the pool water. Green hair is not caused by chlorine. The copper may get into the water by the bad practice of placing trichlor tabs in the skimmer. This acidic product will cause low-pH water, which in turn will dissolve metals in the equipment. The dissolved metal (usually copper) then stains hair, fingernails and, eventually, pool walls. It can also be caused by keeping the pH too low or misusing acid.