Turn off filter and wait until water is calm enough to see spots on the bottom.
Brush black algae spots with a stiff bristle or wire brush.
Pour approximately 1 oz. (1/8 cup) of Hasa’s Algi-Ban directly over the spot and allow it to settle to the bottom. Use enough of this product to completely cover the algae spot.
Allow Algi-Ban to dissolve for a period of 45 to 60 minutes, then brush black algae away.
It may be necessary to repeat treatment or allow more contact time.
When algae is located on the pool walls:
Brush black algae spots with a stiff bristle or wire brush.
Place 1 oz. (1/8 cup) of Hasa’s Algi-Ban in a cotton cloth.
Tie off with string and lower the bag into the water so that it touches the black algae spot.
Allow the bag to remain in place 45 to 60 minutes, then remove and brush algae away.
In extreme cases, it may be necessary to repeat treatment or allow more contact time.
For spot treatment on walls and bottom, use the prescribed dosage regardless of pool gallonage.
When pool is infested with black algae:
Adjust the pH to 7.2 – 7.8.
Brush black algae spots with a stiff bristle or wire brush.
Add at least one pound of Algi-Ban per 4,000 gallons of pool water and broadcast it over entire pool surface all at one time.
Shut down pump for 24 hours.
Follow this treatment with a thorough brushing.
If a few traces of black algae remain, steps 1 through 5 should be repeated or the instructions for spot black algae should be followed.
In severe cases, where the pool has been neglected for long periods of time, consult your pool service expert for advice.
**Do not swim in pool during treatment and until chlorine residual has reached 1.0 ppm – 3.0 ppm. This usually takes 24 hours or can be expedited with an application of HASA’s Neutralizer.**
**This product is a strong, oxidizing and bleaching agent. It should not be used in vinyl, fiberglass, painted, or colored plastered pools.**
