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.
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.
These micro organisms develop colonies behind the liner and left unchecked eventually will permeate through to the printed side appearing as dark gray or black.
Over time the pool liner can fade or accumulate stains and dirt.
Black algae in a vinyl pool is possible but not very likely.
You can also use about 1 2 lb.
Black algae will dot the liner in black spots.
Go ahead and test the ph level of the water.
It will flourish in a warm pool with lots of sunny days.
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.
It also prevents the growth of algae bacteria and fungus in the pool.
Brush every black algae spot with a steel bristle brush to remove the protective layer.
To remove them start with a rigorous brushing using a nylon brush.
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.
How to get rid of algae in your pool because of its appearance black algae look a little frightening.
The vinyl pool liner in your pool is designed to add a nice finish to the bottom and sides of your pool.
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Nylon brushes will not work.
To clean a vinyl pool liner you can brush wipe and vacuum it.
These organisms are tough and have a thick coat to resist chlorine effects.
If the algae problem is extensive use a filter cleaner rather than just plain water.
Of calcium hypochlorite granular chlorine in an old sock to put on a spot.
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.
Don t leave the chlorine on the spot for too long as it may bleach the liner.