Black Spots On Vinyl Pool Liner

Alga spores may always be present in your pool but problems arise when the right conditions are present and the algae are able to bloom.

Black spots on vinyl pool liner.

Nylon brushes will not work. You can also use about 1 2 lb. Bacteria sometimes show up years after a pool has been installed. Algae are diverse simple plants that thrive in water.

Depending on the type of stain different treatments are required to correct the problem. Vinyl pool stains can be removed with acidic stain removal products like stain free or a stain remover or jack s magic blue stuff for vinyl liners. Black stains on vinyl pool liner are not the best sight. Of all the alga types and species on the planet black algae can be the most difficult to treat and most resilient to remove from a swimming pool.

We think the bacteria can be washed into your pool area by flooding rains or when a septic tank overflows. Brush every black algae spot with a steel bristle brush to remove the protective layer. Too much copper iron calcium or salts can all result in vinyl liner staining or marks. 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.

You can also use about 1 2 lb. Of calcium hypochlorite granular chlorine in an old sock to put on a spot. For a semi bad part. If the stain doesn t lighten up gets darker or the color changes to black it s probably a metal stain.

They are telling you that something somewhere is not alright. Black staining that appears on vinyl pool liners can originate from a number of sources and primarily falls into two categories. Of calcium hypochlorite granular chlorine in an old sock to put on a spot. Black algae can get into your pool several ways but one of the most common is from swimming suits that have been in the ocean source.

Maintain proper pool chemistry levels. Mineral and metal stains. Copper iron and manganese may be introduced into the pool via source water. Don t leave the chlorine on the spot for too long as it may bleach the liner.

5 10 minutes max. Metal staining and black algae. Black algae in a vinyl pool is possible but not very likely. The stain colors range from yellow to brown to black.

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. To confirm it s a metal stain get a vitamin c tablet crushed up acsorbic acid put that in a sock and place it on the stain. If the stain is on your vinyl pool steps try jack s magic step stuff. Those pesky little spores stick to the cloth and hop off in the pool the first chance they get so be sure to use bleach to clean them.