Black algae spots occur in a swimming pool when your water has low free chlorine level and or dirt is allowed to build up on the surface preventing the chlorine in the water from reaching the surface for a period of time.
Black algae treatment swimming pools.
Apply a quality pool shock product and follow the label directions to boost any residual chlorine in your pool.
Like green algae the best course of action to treat mustard and black algae is to add shock and algaecide.
Black algae is a super resistant and hard to kill algae strain.
Weekly brushing moves the water right near the surface and gets most of the dirt off.
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.
How to remove black algae.
Black algae has a hard outer shell that protects the cells inside.
To treat black algae in your swimming pool start by brushing the sides and bottom of your pool to break up the algae so it s easier to remove.
It appears as dark black spots on the walls and floor of the pool and is slippery to the touch.
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.
Maintain proper pool chemistry levels.
Black algae is a thread like growth that develops on rough surfaces in swimming pools.
Of the many types of algae that can grow in a swimming pool black algae is the most troublesome.
Vigorously brush the affected area of your pool surface where black algae has grown.
These spots are pin head to quarter sized.
Use a pool water test kit to test and balance your chemical levels.
Good circulation is a must.
If you have black algae in your pool you have black algae in your filter.
This type of algae forms in a layered structure with the outermost layer protecting the lower layers.
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.
Using a pumice stone on plaster pools only scrub the black algae to break up the protective layer.
Black algae in pools is similar to that which can be found in between bathroom shower tiles and on silicone seams near the bathtub.
It has more resistance to chlorine than other types of algae and once it establishes itself in the pores of a concrete or gunite pool it is very difficult to remove.
During the shocking and algaecide treatments leave the pump and filter running all the time.
Immediately after brushing triple shock the pool by adding 3 pounds 1 36 kg of shock per 10 000 gallons 37 854 l of water.
Next add a copper based algaecide to the water and aim the water return jets at the algae patches.
