Black Algae Vinyl Pool Liner

Black stains on vinyl pool liner.

Black algae vinyl pool liner.

Alot of people initially treat it chemically as a algae growth major shock treatment in addition to a special algaecide. Black algae will dot the liner in black spots. Over the last 12 yrs i have probably looked at over 100 inground vinyl pools with this black mold growth under the liner. Any algae including black algae tend to bloom in bodies of pool water with a high ph level low chlorine bad circulation and filtration and not enough chlorine.

If you have black algae in your pool you have black algae in your filter. What differentiates it from algae is that it s more of a parasitic type organism says terry arko water specialist for seaklear pool spa products based in bothell wash. If you have a vinyl lined pool do not use a wire brush as this can tear the liner shock or super chlorinate the pool using granular chlorine also known as calcium hypo chloride. The resistant coating will become weak and break.

To remove them start with a rigorous brushing using a nylon brush. Black algae in a vinyl pool is possible but not very likely. It also prevents the growth of algae bacteria and fungus in the pool. If there s only a small amount of black algae in the pool you can probably get away with backwashing your pool filter for sand or de filters or rinsing the filter cartridge.

You can also use about 1 2 lb. Go ahead and test the ph level of the water. These organisms are tough and have a thick coat to resist chlorine effects. Nylon brushes will not work.

Don t leave the chlorine on the spot for too long as it may bleach the liner. Of calcium hypochlorite granular chlorine in an old sock to put on a spot. To clean a vinyl pool liner you can brush wipe and vacuum it. If the algae problem is extensive use a filter cleaner rather than just plain water.

Over time the pool liner can fade or accumulate stains and dirt. How to get rid of algae in your pool because of its appearance black algae look a little frightening. It will flourish in a warm pool with lots of sunny days. Brush every black algae spot with a steel bristle brush to remove the protective layer.