Dark Spots On Vinyl Pool Liner

Too much copper iron calcium or salts can all result in vinyl liner staining or marks.

Dark spots on vinyl pool liner.

The size location and color are important to identify the cause of the pool stain so you can properly identify and stop the source. Brush every black algae spot with a steel bristle brush to remove the protective layer. Mineral and metal stains. Nylon brushes will not work.

And while a vinyl pool is not nearly as susceptible to algae if you happen to notice an infestation a softer bristled brush can be used. If the stain lightens from a small application of chlorine on it the stain is organic in nature. If the stain is old or excessive then the pool may have to be shocked to remove the stain. 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.

To remove persistent staining put a chlorine tablet into an old sock along with a few rocks and put it on the stained area. Too much copper usually results in blue green staining while iron results in. Bacteria sometimes show up years after a pool has been installed. Black algae will often appear on the pool liner as a series of small black spots.

For metal stains either stain solution 1 the iron cobalt spot etching stuff or 2 the copper scale stuff may be indicated depending on the metals discovered. Repeat until the black spots go away. In most cases this is all that is needed with vinyl pool liners. To get rid of the stain start by using a nylon brush to brush the spots and open up the coating.

Beware this works great on plaster pools but don t try this to remove stains on a vinyl pool because it could remove the liner pattern. Then scrub the spots again. Vinyl liners can stain in localized areas and spread throughout the pool surfaces. Jack will be vinyl liner blue stuff a powerful sequestrant that prevents and removes stains on vinyl pools.

The stain colors range from yellow to brown to black. For many vinyl liner stains the prescription from dr. If your pool has a dark surface you may need to skip this step as it could cause discoloration. Step 2 check the ph levels of the pool with the test kit.

The spots are black or blue green with raised heads not free floating.