Algae Under Vinyl Pool Liner. As it expels carbon dioxide the ph level of pool water can rise. Chemical pool stains or uv stains are more tricky to treat and are most likely un treatable. Clean the pool the first thing that has to be done is to clean the pool to remove as much organic debris as possible.
To prevent pool stains from developing on your pool liner in the future always keep pool water balanced by checking the chemicals and using a pool cleaner on a regular basis to get rid of dirt and grime that tends to build up with regular use. If you have black or grey cloud like stains on the floor of your in ground vinyl liner they are most likely caused by bacteria that is living in the ground under your pool.
These stains normally occur after a long winter or thunderstorm.
Growing because it is damp under the pool christiana says. These stains normally occur after a long winter or thunderstorm. A beautiful new inground liner nothing matches the soft feel and bright luster of a vinyl lined pool. If you have black or grey cloud like stains on the floor of your in ground vinyl liner they are most likely caused by bacteria that is living in the ground under your pool.
