How do I get rid of Black Algae in my pool?

Certain types of algae in your pool are relatively easy to eliminate. However, black algae can be a nightmare to deal with. This stubborn type of algae will grow into your walls and test your patience. Be forewarned, it requires a lot of grunt work and brushing to get rid of. But don’t fret, the experts at Pinch A Penny have found the most effective method to eliminate black algae and prevent it from coming back.

 

What is black algae?

Black algae is a super resistant and hard-to-kill algae strain. It appears as small, black dots or blotches on your pool’s walls, floors and surfaces. These spots are pin-head to quarter sized. Black algae has a hard outer shell that protects its cells. Pools with porous surfaces like concrete, gunite and exposed aggregate are more susceptible to black algae because it can penetrate and grab hold of the walls.

 black algae swimming pool

How do I get rid of it?

There are 2 products you will need. The first is Suncoast Metal Control. This product, which contains calcium, softens the outer shell. This makes it easier for the algaecide to work. The other is Suncoast Super Black Algaecide. This fast-acting, concentrated algaecide is specifically formulated to kill black algae. Finally, you’ll also need a brush with stainless steel bristles. Here is what you need to do:

Step 1: Adjust the pool water pH to the normal range of 7.4-7.6 and the alkalinity to within 80-120 ppm.

Step 2: Brush all the black spots with a wire algae brush (use a nylon brush for vinyl, fiberglass or painted pools).

Step 3: Add 1.5 quarts of Suncoast Metal Control per 10,000 gallons.

Step 4: Mix Suncoast Super Black Algaecide into a bucket of water and pour away from the sides of the pool. Use 12 oz. per 10,000 gallons.

Step 5: Brush the black spots daily while algae is visible. *

Step 6: Follow the ABC’s of Pool Care.

*For severe cases, consult with the experts at your local Pinch A Penny. You may need to repeat this process or increase the dosage requirements.

 

After Treatment

Black algae is more likely to come back after an initial outbreak. Use Suncoast All in One Algaecide to prevent future algae breakouts. This is the best multi-purpose algaecide. It keeps your pool algae-free without foaming and contains a clarifier to keep your water sparkling. It is recommended that you use All in One on a weekly basis. Keeping your pool properly treated and balanced is the best way to prevent algae blooms from returning.

Warning: Please read all bottles and observe all warnings and printed precautions. Use safety equipment. Never add water to chemicals when mixing, add chemicals to water.


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