Algatec Premium Algaecide & Clarifier :
The EasyCare Algatec product is an easy way to rid your pool of green, yellow, and black algae. It will effectively kill green and yellow algae in 4 to 24 hours, and black algae in about 7 to 10 days. This formula does not stain, foam or lose chlorine when added to the pool. Use this product regularly if you want your pool to maintain a sparkling clear appearance.
Eliminates green, yellow, and black algae
Kill green and yellow algae in 4 to 24 hours, and black algae in 7-10 days
Does not stain, foam or lose chlorine when added to the pool
Sinks dead algae to bottom for easy removal