No matter what the size any pool is susceptible to mold and mildew growth.
Black mold on vinyl pool liner.
Mold and mildew thrive in damp dark areas which make vinyl pools the perfect breeding ground.
Brushing the black algae loosens it from the pool s surfaces and puts it into the water where the shock will be able to kill it.
That is unless you have a fiberglass or vinyl liner.
If your pool uses a sand filter replace the sand.
Nylon brushes will not work.
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.
Vinyl pools come in varying sizes from baby pools to family size pools.
It happens more with plaster.
Alot of people initially treat it chemically as a algae growth major shock treatment in addition to a special algaecide.
If this subject is still a active discussion maybe i can add a little more info.
But you ll finally understand what black algae actually is why it s so bad for your pool and how to also prevent it from ever coming back again.
This is a stabilized chlorine that will add cya into the pool.
Brush every black algae spot with a steel bristle brush to remove the protective layer.
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.
Bacteria sometimes show up years after a pool has been installed.
This is because it digs into the surface and creates layers for itself like an onion.
Going through the readings the cya is just a bit low.
First black alge mold is pretty uncommon for vinyl liners.
Be aware that a vinyl sided pool will need to be treated more delicately.
Over the last 12 yrs i have probably looked at over 100 inground vinyl pools with this black mold growth under the liner.
Following the steps outlined in this guide has allowed my family s swimming pool to remain mostly black algae free for a while now.
Tackling the toughest stains of all the kind behind the liner.
Step 3 remove mold.
In that case use a nylon bristled brush and about twice as much elbow grease.